patch 8.0.0288: errors reported while running tests

Problem:    Errors reported while running tests.
Solution:   Put comma in the right place.
diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index c2260c7..430b89a 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -158,7 +158,7 @@
       \ 'Test_communicate()',
       \ 'Test_nb_basic()',
       \ 'Test_pipe_through_sort_all()',
-      \ 'Test_pipe_through_sort_some()'
+      \ 'Test_pipe_through_sort_some()',
       \ 'Test_reltime()',
       \ ]
 
diff --git a/src/version.c b/src/version.c
index ae1e48e..4e041c6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    288,
+/**/
     287,
 /**/
     286,