patch 8.0.0724: the message for yanking doesn't indicate the register

Problem:    The message for yanking doesn't indicate the register.
Solution:   Show the register name in the "N lines yanked" message. (Lemonboy,
            closes vim#1803, closes vim#1809)

src/Makefile

@@ -2227,6 +2227,7 @@ test_arglist \
 	test_regex_char_classes \
 	test_regexp_latin \
 	test_regexp_utf8 \
+	test_registers \
 	test_reltime \
 	test_retab \
 	test_ruby \

src/ops.c

@@ -3167,19 +3167,29 @@ op_yank(oparg_T *oap, int deleting, int mess)
 	/* Some versions of Vi use ">=" here, some don't...  */
 	if (yanklines > p_report)
 	{
+	    char namebuf[100];
+
+	    if (oap->regname == NUL)
+		*namebuf = NUL;
+	    else
+		vim_snprintf(namebuf, sizeof(namebuf),
+						   " into \"%c", oap->regname);
+
 	    /* redisplay now, so message is not deleted */
 	    update_topline_redraw();
 	    if (yanklines == 1)
 	    {
 		if (oap->block_mode)
-		    MSG(_("block of 1 line yanked"));
+		    smsg((char_u *)_("block of 1 line yanked%s"), namebuf);
 		else
-		    MSG(_("1 line yanked"));
+		    smsg((char_u *)_("1 line yanked%s"), namebuf);
 	    }
 	    else if (oap->block_mode)
-		smsg((char_u *)_("block of %ld lines yanked"), yanklines);
+		smsg((char_u *)_("block of %ld lines yanked%s"),
+		     yanklines, namebuf);
 	    else
-		smsg((char_u *)_("%ld lines yanked"), yanklines);
+		smsg((char_u *)_("%ld lines yanked%s"), yanklines,
+		     namebuf);
 	}
     }
 

src/testdir/Make_all.mak

@@ -184,6 +184,7 @@ NEW_TESTS = test_arabic.res \
 	    test_quickfix.res \
 	    test_quotestar.res \
 	    test_retab.res \
+	    test_registers.res \
 	    test_ruby.res \
 	    test_search.res \
 	    test_signs.res \

src/testdir/test_registers.vim

@@ -0,0 +1,27 @@
+
+func Test_yank_shows_register()
+    enew
+    set report=0
+    call setline(1, ['foo', 'bar'])
+    " Line-wise
+    exe 'norm! yy'
+    call assert_equal('1 line yanked', v:statusmsg)
+    exe 'norm! "zyy'
+    call assert_equal('1 line yanked into "z', v:statusmsg)
+    exe 'norm! yj'
+    call assert_equal('2 lines yanked', v:statusmsg)
+    exe 'norm! "zyj'
+    call assert_equal('2 lines yanked into "z', v:statusmsg)
+
+    " Block-wise
+    exe "norm! \<C-V>y"
+    call assert_equal('block of 1 line yanked', v:statusmsg)
+    exe "norm! \<C-V>\"zy"
+    call assert_equal('block of 1 line yanked into "z', v:statusmsg)
+    exe "norm! \<C-V>jy"
+    call assert_equal('block of 2 lines yanked', v:statusmsg)
+    exe "norm! \<C-V>j\"zy"
+    call assert_equal('block of 2 lines yanked into "z', v:statusmsg)
+
+    bwipe!
+endfunc

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    724,
 /**/
     723,
 /**/