gui: Fix presentation of @w TexInfo macro for Qt (bug #66459)

* doc/interpreter/basics.txi, doc/interpreter/expr.txi,
doc/interpreter/external.txi, doc/interpreter/install.txi,
doc/interpreter/oop.txi, doc/interpreter/package.txi, doc/interpreter/plot.txi,
libinterp/corefcn/bitfcns.cc, libinterp/corefcn/chol.cc,
libinterp/corefcn/environment.cc, libinterp/corefcn/oct-hist.cc,
libinterp/corefcn/qr.cc, scripts/help/__unimplemented__.m,
scripts/help/bessel.m, scripts/io/csvwrite.m,
scripts/linear-algebra/linsolve.m, scripts/plot/appearance/view.m,
scripts/plot/util/groot.m, scripts/signal/movfun.m, scripts/sparse/bicg.m,
scripts/sparse/pcg.m, scripts/statistics/corr.m, scripts/statistics/cov.m,
scripts/statistics/kurtosis.m, scripts/statistics/movmad.m,
scripts/statistics/movmax.m, scripts/statistics/movmean.m,
scripts/statistics/movmedian.m, scripts/statistics/movmin.m,
scripts/statistics/movprod.m, scripts/statistics/movstd.m,
scripts/statistics/movsum.m, scripts/statistics/movvar.m:
Use macro "@ " instead of bare space after @w macro to force a space.

doc/interpreter/basics.txi

@@ -123,8 +123,8 @@ Print short help message and exit.
 Add path to the head of the search path for images.  The value of
 @var{path} specified on the command line will override any value of
 @w{@env{OCTAVE_IMAGE_PATH}}@ found in the environment, but not any commands
-in the system or user startup files that call the @w{@env{IMAGE_PATH}}@
-function.
+in the system or user startup files that call the
+@w{@env{IMAGE_PATH}}@ function.
 
 @item --info-file @var{filename}
 @cindex @sortas{options, Octave command --info-file} @ @ @code{--info-file @var{filename}}
@@ -355,8 +355,8 @@ overridden by the environment variable @w{@env{OCTAVE_VERSION_INITFILE}}.
 @item @var{config-dir}/octave/octaverc
 @cindex personal startup file
 where @code{@var{config-dir}} is the platform-dependent location for user
-local configuration files (e.g., @w{@env{$XDG_CONFIG_HOME}} on many Unix-like
-operating systems or @w{@env{%APPDATA%}} on Windows).
+local configuration files (e.g., @w{@env{$XDG_CONFIG_HOME}}@ on many Unix-like
+operating systems or @w{@env{%APPDATA%}}@ on Windows).
 
 @item ~/.octaverc
 @cindex personal startup file

doc/interpreter/expr.txi

@@ -261,7 +261,7 @@ data(idx)
 
 @noindent
 Instead of creating the @code{idx} array it is possible to replace
-@code{data(idx)} with @w{@code{data( data <= 2 )}} in the above code.
+@code{data(idx)} with @w{@code{data( data <= 2 )}}@ in the above code.
 
 While the size of the logical index expressions is usually the same as that
 of the array being indexed, this is not a necessary condition.  If the logical
@@ -375,7 +375,7 @@ the respective dimension of the array.
 However, if the number of indexing components exceeds the number of dimensions
 (@w{@code{M > nd}}) then the excess components must all be singletons
 (@code{1}).  Moreover, if @w{@code{M < nd}}, the behavior is equivalent to
-reshaping the input object so as to merge the trailing @w{@code{nd - M}}
+reshaping the input object so as to merge the trailing @w{@code{nd - M}}@ 
 dimensions into the last index dimension @code{M}.  Thus, the result will have
 the dimensionality of the index expression, and not the original object.  This
 is the case whenever dimensionality of the index is greater than one

doc/interpreter/external.txi

@@ -158,8 +158,9 @@ most of the definitions necessary for a C++ oct-file.  Note that
 @file{octave/oct.h} is a C++ header and cannot be directly @code{#include}'ed
 in a C source file, nor any other language.
 
-Included by @file{oct.h} is a definition for the macro @w{@code{DEFUN_DLD}}@
-which creates a dynamically loaded function.  This macro takes four arguments:
+Included by @file{oct.h} is a definition for the macro
+@w{@code{DEFUN_DLD}}@ which creates a dynamically loaded function.  This macro
+takes four arguments:
 
 @enumerate 1
 @item The function name as it will be seen in Octave,

doc/interpreter/install.txi

@@ -839,7 +839,7 @@ Octave's 64-bit index support is activated with the configure option
 You must ensure that all Fortran sources except those in the
 @file{liboctave/external/ranlib} directory are compiled such that INTEGERS are
 8-bytes wide.  If you are using gfortran, the configure script should
-automatically set the Makefile variable @w{@env{F77_INTEGER_8_FLAG}} to
+automatically set the Makefile variable @w{@env{F77_INTEGER_8_FLAG}}@ to
 @option{-fdefault-integer-8}.  If you are using another compiler, you
 must set this variable yourself.  You should NOT set this flag in
 @env{FFLAGS}, otherwise the files in @file{liboctave/external/ranlib} will be

doc/interpreter/oop.txi

@@ -753,8 +753,8 @@ f.polynomial = 1 + 2 * X + 3 * X ^ 2
 @end group
 @end example
 
-Defining the @w{FIRfilter} class as a child of the polynomial class implies
-that a @w{FIRfilter} object may be used any place that a polynomial object may
+Defining the @w{FIRfilter}@ class as a child of the polynomial class implies
+that a @w{FIRfilter}@ object may be used any place that a polynomial object may
 be used.  This is not a normal use of a filter.  It may be a more sensible
 design approach to use aggregation rather than inheritance.  In this case, the
 polynomial is simply a field in the class structure.  A class constructor for

doc/interpreter/package.txi

@@ -245,8 +245,8 @@ autoload ('bar', which ('foo'));
 @end example
 
 @noindent
-@xref{PKG_ADD and PKG_DEL Directives}, for details on @w{@code{PKG_ADD}}@
-directives.
+@xref{PKG_ADD and PKG_DEL Directives}, for details on
+@w{@code{PKG_ADD}}@ directives.
 
 @cindex PKG_DEL
 @anchor{XREFPKG_DEL}
@@ -255,8 +255,8 @@ An optional file that includes commands that are run when the package
 is removed from the users path.  Note that @w{@code{PKG_DEL}}@ directives in
 the source code of the package will also be added to this file by the
 Octave package manager.
-@xref{PKG_ADD and PKG_DEL Directives}, for details on @w{@code{PKG_DEL}}@
-directives.
+@xref{PKG_ADD and PKG_DEL Directives}, for details on
+@w{@code{PKG_DEL}}@ directives.
 
 @item package/pre_install.m
 This is an optional function that is run prior to the installation of a

doc/interpreter/plot.txi

@@ -817,8 +817,8 @@ numerically @tab
 
 Finally, superscripting and subscripting can be controlled with the @qcode{'^'}
 and @qcode{'_'} characters.  If the @qcode{'^'} or @qcode{'_'} is followed by a
-@{ character, then all of the block surrounded by the @w{@{ @}} pair is
-superscripted or subscripted.  Without the @w{@{ @}} pair, only the character
+@{ character, then all of the block surrounded by the @w{@{ @}}@ pair is
+superscripted or subscripted.  Without the @w{@{ @}}@ pair, only the character
 immediately following the @qcode{'^'} or @qcode{'_'} is changed.
 
 @float Table,tab:extended
@@ -1065,10 +1065,10 @@ width 0.6pt \tabskip=0pt\cr
 @cindex Degree Symbol
 
 Conformance to both @TeX{} and @sc{matlab} with respect to the @code{\circ}
-symbol is impossible.  While @TeX{} translates this symbol to @w{Unicode 2218}
-(U+2218), @sc{matlab} maps this to @w{Unicode 00B0} (U+00B0) instead.  Octave
-has chosen to follow the @TeX{} specification, but has added the additional
-symbol @code{\deg} which maps to the degree symbol (U+00B0).
+symbol is impossible.  While @TeX{} translates this symbol to
+@w{Unicode 2218}@ (U+2218), @sc{matlab} maps this to @w{Unicode 00B0}@ (U+00B0)
+instead.  Octave has chosen to follow the @TeX{} specification, but has added
+the additional symbol @code{\deg} which maps to the degree symbol (U+00B0).
 
 @node "latex" interpreter
 @subsubsection "latex" interpreter

libinterp/corefcn/bitfcns.cc

@@ -669,8 +669,8 @@ The input is either a string specifying a floating point type, or it is an
 existing floating point variable @var{var}.
 
 The default type is @qcode{"double"}, but @qcode{"single"} is a valid option.
-On IEEE 754 compatible systems, @code{flintmax} is @w{@math{2^{53}}} for
-@qcode{"double"} and @w{@math{2^{24}}} for @qcode{"single"}.
+On IEEE 754 compatible systems, @code{flintmax} is @w{@math{2^{53}}}@ for
+@qcode{"double"} and @w{@math{2^{24}}}@ for @qcode{"single"}.
 
 Example Code - query an existing variable
 

libinterp/corefcn/chol.cc

@@ -807,8 +807,8 @@ original factored matrix.
 Given a Cholesky@tie{}factorization of a real symmetric or complex Hermitian
 positive definite matrix @w{@var{A} = @var{R}'*@var{R}}, @var{R}@tie{}upper
 triangular, return the Cholesky@tie{}factorization of
-@var{A1}, where @w{A1(p,p) = A}, @w{A1(:,j) = A1(j,:)' = u} and
-@w{p = [1:j-1,j+1:n+1]}.  @w{u(j)} should be positive.
+@var{A1}, where @w{A1(p,p) = A}, @w{A1(:,j) = A1(j,:)' = u}@ and
+@w{p = [1:j-1,j+1:n+1]}.  @w{u(j)}@ should be positive.
 
 On return, @var{info} is set to
 
@@ -1186,7 +1186,7 @@ original factored matrix.
 Given a Cholesky@tie{}factorization of a real symmetric or complex Hermitian
 positive definite matrix @w{@var{A} = @var{R}'*@var{R}}, @var{R}@tie{}upper
 triangular, return the Cholesky@tie{}factorization of
-@w{@var{A}(p,p)}, where @w{p} is the permutation @*
+@w{@var{A}(p,p)}, where p is the permutation @*
 @code{p = [1:i-1, shift(i:j, 1), j+1:n]} if @w{@var{i} < @var{j}} @*
  or @*
 @code{p = [1:j-1, shift(j:i,-1), i+1:n]} if @w{@var{j} < @var{i}}.  @*

libinterp/corefcn/environment.cc

@@ -164,9 +164,9 @@ DEFMETHOD (EDITOR, interp, args, nargout,
 @deftypefnx {} {@var{old_val} =} EDITOR (@var{new_val}, "local")
 Query or set the internal variable that specifies the default text editor.
 
-The default value is taken from the environment variable @w{@env{EDITOR}}@
-when Octave starts.  If the environment variable is not initialized,
-@w{@env{EDITOR}}@ will be set to @qcode{"emacs"}.
+The default value is taken from the environment variable
+@w{@env{EDITOR}}@ when Octave starts.  If the environment variable is not
+initialized, @w{@env{EDITOR}}@ will be set to @qcode{"emacs"}.
 
 When called from inside a function with the @qcode{"local"} option, the
 variable is changed locally for the function and any subroutines it calls.

libinterp/corefcn/oct-hist.cc

@@ -826,10 +826,11 @@ All future commands issued during the current Octave session will be written to
 this new file (if the current setting of @code{history_save} allows for this).
 
 The default value is @file{@w{@env{$DATA}}/octave/history}, where
-@w{@env{$DATA}} is the platform-specific location for (roaming) user data files
-(e.g., @w{@env{$XDG_DATA_HOME}} or, if that is not set, @file{~/.local/share}
-on Unix-like operating systems or @w{@env{%APPDATA%}} on Windows).  The default
-value may be overridden by the environment variable @w{@env{OCTAVE_HISTFILE}}.
+@w{@env{$DATA}}@ is the platform-specific location for (roaming) user data files
+(e.g., @w{@env{$XDG_DATA_HOME}}@ or, if that is not set, @file{~/.local/share}
+on Unix-like operating systems or @w{@env{%APPDATA%}}@ on Windows).  The
+default value may be overridden by the environment variable
+@w{@env{OCTAVE_HISTFILE}}.
 
 Programming Notes:
 

libinterp/corefcn/qr.cc

@@ -1470,7 +1470,7 @@ vector to be inserted into @var{A} (if @var{orient} is @qcode{"row"}).
 The default value of @var{orient} is @qcode{"col"}.  If @var{orient} is
 @qcode{"col"}, @var{u} may be a matrix and @var{j} an index vector
 resulting in the QR@tie{}factorization of a matrix @var{B} such that
-@w{B(:,@var{j})} gives @var{u} and @w{B(:,@var{j}) = []} gives @var{A}.
+@w{B(:,@var{j})}@ gives @var{u} and @w{B(:,@var{j}) = []}@ gives @var{A}.
 Notice that the latter case is done as a sequence of k insertions;
 thus, for k large enough, it will be both faster and more accurate to
 recompute the factorization from scratch.
@@ -1677,7 +1677,7 @@ The default value of @var{orient} is @qcode{"col"}.
 
 If @var{orient} is @qcode{"col"}, @var{j} may be an index vector
 resulting in the QR@tie{}factorization of a matrix @var{B} such that
-@w{A(:,@var{j}) = []} gives @var{B}.  Notice that the latter case is done as
+@w{A(:,@var{j}) = []}@ gives @var{B}.  Notice that the latter case is done as
 a sequence of k deletions; thus, for k large enough, it will be both faster
 and more accurate to recompute the factorization from scratch.
 

scripts/help/__unimplemented__.m

@@ -587,7 +587,7 @@
 
     case "not loaded",
       txt = sprintf (["%s which you have installed, but not loaded.  ", ...
-                      "To load the package, type @w{@code{pkg load %s}} ", ...
+                      "To load the package, type @w{@code{pkg load %s}}@ ", ...
                       "from the Octave prompt."], txt, name);
 
     otherwise

scripts/help/bessel.m

@@ -54,8 +54,8 @@
 ## @item besselh
 ## Compute Hankel functions of the first (@var{k} = 1) or second (@var{k} = 2)
 ## kind.  If the argument @var{opt} is supplied, the result is multiplied by
-## @w{@code{exp (-I*@var{x})}}@ for @var{k} = 1 or @w{@code{exp (I*@var{x})}}@ 
-## for @var{k} = 2.
+## @w{@code{exp (-I*@var{x})}}@ for @var{k} = 1 or
+## @w{@code{exp (I*@var{x})}}@ for @var{k} = 2.
 ## @end table
 ##
 ## If @var{alpha} is a scalar, the result is the same size as @var{x}.  If

scripts/io/csvwrite.m

@@ -27,7 +27,7 @@
 ## @deftypefn  {} {} csvwrite (@var{filename}, @var{x})
 ## @deftypefnx {} {} csvwrite (@var{filename}, @var{x}, @var{dlm_opt1}, @dots{})
 ## Write the numeric matrix @var{x} to the file @var{filename} in
-## @w{comma-separated-value} (CSV) format.
+## @w{comma-separated-value}@ (CSV) format.
 ##
 ## This function is equivalent to
 ##

scripts/linear-algebra/linsolve.m

@@ -30,7 +30,7 @@
 ## Solve the linear system @code{A*x = b}.
 ##
 ## With no options, this function is equivalent to the left division operator
-## @w{(@code{x = A \ b})} or the matrix-left-divide function
+## @w{(@code{x = A \ b})}@ or the matrix-left-divide function
 ## @w{(@code{x = mldivide (A, b)})}.
 ##
 ## Octave ordinarily examines the properties of the matrix @var{A} and chooses

scripts/plot/appearance/view.m

@@ -37,11 +37,13 @@
 ## arguments or as 2-element vector.  The viewpoint can also be specified with
 ## Cartesian coordinates @var{x}, @var{y}, and @var{z}.
 ##
-## The call @code{view (2)} sets the viewpoint to @w{@var{azimuth} = 0}@
-## and @w{@var{elevation} = 90}, which is the default for 2-D graphs.
+## The call @code{view (2)} sets the viewpoint to
+## @w{@var{azimuth} = 0}@ and @w{@var{elevation} = 90}, which is the default
+## for 2-D graphs.
 ##
-## The call @code{view (3)} sets the viewpoint to @w{@var{azimuth} = -37.5}@
-## and @w{@var{elevation} = 30}, which is the default for 3-D graphs.
+## The call @code{view (3)} sets the viewpoint to
+## @w{@var{azimuth} = -37.5}@ and @w{@var{elevation} = 30}, which is the
+## default for 3-D graphs.
 ##
 ## If the first argument @var{hax} is an axes handle, then operate on
 ## this axes rather than the current axes returned by @code{gca}.

scripts/plot/util/groot.m

@@ -30,8 +30,8 @@
 ## The root graphics object is the ultimate parent of all graphics objects.
 ##
 ## In addition, the root object contains information about the graphics
-## system as a whole such as the @code{ScreenSize}.  Use @w{@code{get (groot)}}
-## to find out what information is available.
+## system as a whole such as the @code{ScreenSize}.  Use
+## @w{@code{get (groot)}}@ to find out what information is available.
 ##
 ## Defaults for the graphic system as a whole are specified by setting
 ## properties of the root graphics object that begin with @qcode{"Default"}.

scripts/signal/movfun.m

@@ -33,14 +33,14 @@
 ##
 ## If @var{wlen} is a scalar, the function @var{fcn} is applied to a moving
 ## window of length @var{wlen}.  When @var{wlen} is an odd number the window is
-## symmetric and includes @w{@code{(@var{wlen} - 1) / 2}} elements on either
+## symmetric and includes @w{@code{(@var{wlen} - 1) / 2}}@ elements on either
 ## side of the central element.  For example, when calculating the output at
 ## index 5 with a window length of 3, @code{movfun} uses data elements
 ## @w{@code{[4, 5, 6]}}.  If @var{wlen} is an even number, the window is
-## asymmetric and has @w{@code{@var{wlen}/2}} elements to the left of the
-## central element and @w{@code{@var{wlen}/2 - 1}} elements to the right of the
-## central element.  For example, when calculating the output at index 5 with a
-## window length of 4, @code{movfun} uses data elements
+## asymmetric and has @w{@code{@var{wlen}/2}}@ elements to the left of the
+## central element and @w{@code{@var{wlen}/2 - 1}}@ elements to the right of
+## the central element.  For example, when calculating the output at index 5
+## with a window length of 4, @code{movfun} uses data elements
 ## @w{@code{[3, 4, 5, 6]}}.
 ##
 ## If @var{wlen} is an array with two elements @w{@code{[@var{nb}, @var{na}]}},
@@ -57,11 +57,11 @@
 ## computation along dimension 1, i.e., down the columns of the array.
 ##
 ## When applied to an array (possibly multi-dimensional) with @var{n} columns,
-## @var{fcn} may return a result in either of two formats: @w{Format 1)}
-## an array of size 1-by-@var{n}-by-@var{dim3}-by-@dots{}-by-@var{dimN}.  This
+## @var{fcn} may return a result in either of two formats: @w{Format 1)}@ an
+## array of size 1-by-@var{n}-by-@var{dim3}-by-@dots{}-by-@var{dimN}.  This
 ## is the typical output format from Octave core functions.  Type
 ## @code{demo ("movfun", 5)} for an example of this use case.
-## @w{Format 2)} a row vector of length
+## @w{Format 2)}@ a row vector of length
 ## @code{@var{n} * @var{numel_higher_dims}} where @var{numel_higher_dims} is
 ## @w{@code{prod (size (@var{x})(3:end))}}.  The output of @var{fcn} for the
 ## i-th input column must be found in the output at indices

scripts/sparse/bicg.m

@@ -34,8 +34,9 @@
 ## @deftypefnx {} {@var{x} =} bicg (@var{A}, @var{b}, @var{tol}, @var{maxit}, @var{M}, [], @var{x0}, @dots{})
 ## @deftypefnx {} {@var{x} =} bicg (@var{A}, @var{b}, @var{tol}, @var{maxit}, @var{M1}, @var{M2}, @var{x0}, @dots{})
 ## @deftypefnx {} {[@var{x}, @var{flag}, @var{relres}, @var{iter}, @var{resvec}] =} bicg (@var{A}, @var{b}, @dots{})
-## Solve the linear system of equations @w{@code{@var{A} * @var{x} = @var{b}}}@ 
-## by means of the Bi-Conjugate Gradient iterative method.
+## Solve the linear system of equations
+## @w{@code{@var{A} * @var{x} = @var{b}}}@ by means of the Bi-Conjugate
+## Gradient iterative method.
 ##
 ## The input arguments are:
 ##
@@ -65,8 +66,9 @@
 ## @var{M1}, @var{M2} are the preconditioners.  The preconditioner @var{M} is
 ## given as @code{@var{M} = @var{M1} * @var{M2}}.  Both @var{M1} and @var{M2}
 ## can be passed as a matrix or as a function handle or inline function
-## @code{g} such that @w{@code{g (@var{x}, "notransp") = @var{M1} \ @var{x}}}@ 
-## or @w{@code{g (@var{x}, "notransp") = @var{M2} \ @var{x}}}@ and
+## @code{g} such that
+## @w{@code{g (@var{x}, "notransp") = @var{M1} \ @var{x}}}@ or
+## @w{@code{g (@var{x}, "notransp") = @var{M2} \ @var{x}}}@ and
 ## @w{@code{g (@var{x}, "transp") = @var{M1}' \ @var{x}}}@ or
 ## @w{@code{g (@var{x}, "transp") = @var{M2}' \ @var{x}}}.
 ## If @var{M1} is omitted or empty, then preconditioning is not applied.

scripts/sparse/pcg.m

@@ -28,8 +28,9 @@
 ## @deftypefnx {} {@var{x} =} pcg (@var{A}, @var{b}, @var{tol}, @var{maxit}, @var{M}, [], @var{x0}, @dots{})
 ## @deftypefnx {} {[@var{x}, @var{flag}, @var{relres}, @var{iter}, @var{resvec}, @var{eigest}] =} pcg (@var{A}, @var{b}, @dots{})
 ##
-## Solve the linear system of equations @w{@code{@var{A} * @var{x} = @var{b}}}@ 
-## by means of the Preconditioned Conjugate Gradient iterative method.
+## Solve the linear system of equations
+## @w{@code{@var{A} * @var{x} = @var{b}}}@ by means of the Preconditioned
+## Conjugate Gradient iterative method.
 ##
 ## The input arguments are:
 ##

scripts/statistics/corr.m

@@ -29,7 +29,7 @@
 ## Compute matrix of correlation coefficients.
 ##
 ## If each row of @var{x} and @var{y} is an observation and each column is
-## a variable, then the @w{(@var{i}, @var{j})-th} entry of
+## a variable, then the @w{(@var{i}, @var{j})-th}@ entry of
 ## @code{corr (@var{x}, @var{y})} is the correlation between the
 ## @var{i}-th variable in @var{x} and the @var{j}-th variable in @var{y}.
 ## @var{x} and @var{y} must have the same number of rows (observations).

scripts/statistics/cov.m

@@ -52,7 +52,7 @@
 ## If called with one argument, compute @code{cov (@var{x}, @var{x})}.  If
 ## @var{x} is a vector, this is the scalar variance of @var{x}.  If @var{x} is
 ## a matrix, each row of @var{x} is treated as an observation, and each column
-## as a variable, and the @w{(@var{i}, @var{j})-th} entry of
+## as a variable, and the @w{(@var{i}, @var{j})-th}@ entry of
 ## @code{cov (@var{x})} is the covariance between the @var{i}-th and
 ## @var{j}-th columns in @var{x}.  If @var{x} has dimensions n x m, the output
 ## @var{c} will be a m x m square covariance matrix.

scripts/statistics/kurtosis.m

@@ -54,7 +54,7 @@
 ## The optional argument @var{flag} controls which normalization is used.
 ## If @var{flag} is equal to 1 (default value, used when @var{flag} is omitted
 ## or empty), return the sample kurtosis as defined above.  If @var{flag} is
-## equal to 0, return the @w{"bias-corrected"} kurtosis coefficient instead:
+## equal to 0, return the @w{"bias-corrected"}@ kurtosis coefficient instead:
 ## @tex
 ## $$
 ## \kappa_0 = 3 + {\scriptstyle N - 1 \over \scriptstyle (N - 2)(N - 3)} \,