patch 9.1.0860: tests: mouse_shape tests use hard code sleep value

Problem:  tests: mouse_shape tests use hard code sleep value
          (Bram Moolenaar)
Solution: Use WaitForAssert() instead (Yee Cheng Chin)

related: #12157
closes: #16042

Signed-off-by: Yee Cheng Chin <ychin.git@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

Author: ychin

src/testdir/test_normal.vim

@@ -3948,8 +3948,7 @@ func Test_mouse_shape_after_failed_change()
   END
   call writefile(lines, 'Xmouseshape.vim', 'D')
   call RunVim([], [], "-g -S Xmouseshape.vim")
-  sleep 300m
-  call assert_equal(['busy', 'arrow'], readfile('Xmouseshapes'))
+  call WaitForAssert({-> assert_equal(['busy', 'arrow'], readfile('Xmouseshapes'))}, 300)
 
   call delete('Xmouseshapes')
 endfunc
@@ -3980,8 +3979,7 @@ func Test_mouse_shape_after_cancelling_gr()
   END
   call writefile(lines, 'Xmouseshape.vim', 'D')
   call RunVim([], [], "-g -S Xmouseshape.vim")
-  sleep 300m
-  call assert_equal(['beam', 'arrow'], readfile('Xmouseshapes'))
+  call WaitForAssert({-> assert_equal(['beam', 'arrow'], readfile('Xmouseshapes'))}, 300)
 
   call delete('Xmouseshapes')
 endfunc

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    860,
 /**/
     859,
 /**/