tests: make timezone in diff output glob-ed for portability Before this patch, some tests using external "diff" command via extdiff extension fail on Solaris, because system standard "diff" (= /usr/bin/diff) on Solaris doesn't display timezone for timestamp of each files in diff output. This patch makes timezone in external diff output glob-ed for portability of tests, and adds check-code.py a rule to detect such

--- a/contrib/check-code.py	Mon Feb 08 18:29:17 2016 +0900
+++ b/contrib/check-code.py	Mon Feb 08 18:29:17 2016 +0900
@@ -178,6 +178,8 @@
      'use test -f to test for file existence'),
     (r'^  diff -[^ -]*p',
      "don't use (external) diff with -p for portability"),
+    (r'^  [-+][-+][-+] .* [-+]0000 \(glob\)',
+     "glob timezone field in diff output for portability"),
   ],
   # warnings
   [