patch 8.1.0705: :colorscheme isn't tested enough

Problem:    :colorscheme isn't tested enough
Solution:   Improve test coverage of :colorscheme. (Dominique Pelle, closes
            #3777)  Remove unnecessary sleep.
diff --git a/src/testdir/test_gui.vim b/src/testdir/test_gui.vim
index 0775b17..7874fff 100644
--- a/src/testdir/test_gui.vim
+++ b/src/testdir/test_gui.vim
@@ -42,10 +42,15 @@
 
   colorscheme torte
   redraw!
-  sleep 200m
   call assert_equal('dark', &background)
   call assert_equal(1, g:before_colors)
   call assert_equal(2, g:after_colors)
+  call assert_equal("\ntorte", execute('colorscheme'))
+
+  let a = substitute(execute('hi Search'), "\n\\s\\+", ' ', 'g')
+  call assert_match("\nSearch         xxx term=reverse ctermfg=0 ctermbg=12 gui=bold guifg=Black guibg=Red", a)
+
+  call assert_fails('colorscheme does_not_exist', 'E185:')
 
   exec 'colorscheme' colorscheme_saved
   augroup TestColors
diff --git a/src/version.c b/src/version.c
index 95f3859..e772d05 100644
--- a/src/version.c
+++ b/src/version.c
@@ -800,6 +800,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    705,
+/**/
     704,
 /**/
     703,