patch 8.2.1526: line in testdir Makefile got commented out

Problem:    Line in testdir Makefile got commented out. (Christian Brabandt)
Solution:   Revert.

src/testdir/Makefile

@@ -12,7 +12,7 @@ SCRIPTSOURCE = ../../runtime
 # Comment out this line to see the verbose output of tests.
 #
 # Catches SwapExists to avoid hanging at the ATTENTION prompt.
-#REDIR_TEST_TO_NULL = --cmd 'au SwapExists * let v:swapchoice = "e"' > /dev/null
+REDIR_TEST_TO_NULL = --cmd 'au SwapExists * let v:swapchoice = "e"' > /dev/null
 
 # Uncomment this line to use valgrind for memory leaks and extra warnings.
 #   The output goes into a file "valgrind.testN"

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1526,
 /**/
     1525,
 /**/