patch 8.0.0662: stray FIXME for fixed problem

Problem:    Stray FIXME for fixed problem.
Solution:   Remove the comment. (Dominique Pelle)
diff --git a/src/testdir/test_syntax.vim b/src/testdir/test_syntax.vim
index 0b1b4e4..4230865 100644
--- a/src/testdir/test_syntax.vim
+++ b/src/testdir/test_syntax.vim
@@ -478,12 +478,6 @@
 
   set conceallevel=1
   call assert_equal('1X 6   ', ScreenLines(2, 7)[0])
-  " FIXME: with conceallevel=1, I would expect that the portion "45" of
-  " the line to be replaced with a space since ":help 'conceallevel'
-  " states that if listchars is not set, then the default replacement
-  " should be a space. But synconcealed() gives an empty string in
-  " the 2nd value of the returned list. Bug?
-  " So for now, the following line is commented out:
   call assert_equal([[0, ''], [1, 'X'], [1, 'X'], [1, ' '], [1, ' '], [0, '']], map(range(1, 6), 'synconcealed(2, v:val)[0:1]'))
 
   set conceallevel=1
diff --git a/src/version.c b/src/version.c
index 228525c..ab7a929 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    662,
+/**/
     661,
 /**/
     660,