Get rid of the UPPERCASE

belarusian.dtx

@@ -21,7 +21,7 @@ and Belarusian language module v1.1l by Aleksey Novodvorsky <[email protected]>.
 The current maintainer is Andrej Shadura <[email protected]>.
 
 
-INSTALLATION
+Installation
 ------------
 
 - unpack babel-belarusian.zip
@@ -34,7 +34,7 @@ INSTALLATION
 - update filename base (see documentation for your TeX system)
 
 
-USAGE
+Usage
 -----
 
 Belarusian language definition file can be used both with legacy 8-bit engines
@@ -98,21 +98,21 @@ or
 
  \usepackage[english,belarusian.tarask]{babel}
 
-DOCUMENTATION
+Documentation
 -------------
 
 See belarusian.pdf for more information.
 
 
-KNOWN PROBLEMS
+Known problems
 --------------
 
 Before switching from a legacy 8-bit engine (tex, pdftex) to an Unicode
 engine (xetex, luatex) and vise versa delete all .aux, .toc, .lot, .lof
 files as they might have stored incompatible internal encodings.
 
 
-CHANGES
+Changes
 -------
 
 2018-08-25 version 1.4