patch 9.1.0915: GVim: default font size a bit too small

Problem:  GVim: default font size a bit too small
Solution: increase guifont size to 12 pt on GTK builds
          of gVim (matveyt).

fixes: #16172
closes: #16178

Signed-off-by: matveyt <matthewtarasov@yandex.ru>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_gui.vim b/src/testdir/test_gui.vim
index ae65310..2925934 100644
--- a/src/testdir/test_gui.vim
+++ b/src/testdir/test_gui.vim
@@ -105,8 +105,8 @@
     let pat = '\(7x13\)\|\(\c-Misc-Fixed-Medium-R-Normal--13-120-75-75-C-70-ISO8859-1\)'
     call assert_match(pat, fname)
   elseif has('gui_gtk2') || has('gui_gnome') || has('gui_gtk3')
-    " 'expected' is DEFAULT_FONT of gui_gtk_x11.c.
-    call assert_equal('Monospace 10', fname)
+    " 'expected' is DEFAULT_FONT of gui_gtk_x11.c (any size)
+    call assert_match('^Monospace\>', fname)
   endif
 endfunc
 
@@ -426,7 +426,7 @@
 
     " Empty list. Should fallback to the built-in default.
     set guifont=
-    call assert_equal('Monospace 10', getfontname())
+    call assert_match('^Monospace\>', getfontname())
   endif
 
   if has('xfontset')
@@ -613,7 +613,7 @@
 
     " Test recalling default and existing option
     set guifont=
-    call assert_equal('Monospace\ 10', getcompletion('set guifont=', 'cmdline')[0])
+    call assert_match('^Monospace\>', getcompletion('set guifont=', 'cmdline')[0])
     set guifont=Monospace\ 9
     call assert_equal('Monospace\ 9', getcompletion('set guifont=', 'cmdline')[0])