[ci skip] Remove trailing WS

Since commit 2238403 removed respective trailing WS in files generated
by this script, we remove the trailing WS in the first place, to avoid
further mundane merge conflicts.

[1] http://git.php.net/?p=php-src.git;a=commit;h=2238403892ccf87143a59814538d9f764509d9e7

scripts/dev/credits

@@ -7,14 +7,14 @@ for what in ext sapi
 do
   file=ext/standard/credits_$what.h
   cat >$file <<END
-/* 
+/*
                       DO NOT EDIT THIS FILE!
 
- it has been automaticaly created by php7/scripts/credits from  
+ it has been automaticaly created by php7/scripts/credits from
  the information found in the various php7/ext/.../CREDITS and
- php7/sapi/.../CREDITS files 
- 
- if you want to change an entry you have to edit the appropriate 
+ php7/sapi/.../CREDITS files
+
+ if you want to change an entry you have to edit the appropriate
  CREDITS file instead
 
 */