MDL-48855 dev: Fix ctags command to handle extra whitespace

tags.txt

@@ -7,10 +7,10 @@ easily in your editor (eg vim or emacs), you can generate one:
 Exuberant ctags (default on Linux, can be compiled on other platforms):
 ----------------------------------------------------------------------
 
-ctags -R --languages=php --exclude="CVS" --php-kinds=f \
---regex-PHP='/abstract class ([^ ]*)/\1/c/' \
---regex-PHP='/interface ([^ ]*)/\1/c/' \
---regex-PHP='/(public |static |abstract |protected |private )+function ([^ (]*)/\2/f/'
+ctags -R --languages=php --php-kinds=f \
+--regex-PHP='/abstract +class +([^ ]*)/\1/c/' \
+--regex-PHP='/interface +([^ ]*)/\1/c/' \
+--regex-PHP='/(public |static |abstract |protected |private )+ *function +([^ (]*)/\2/f/'
 
 BSD ctags (Default on Mac OS X):
 -------------------------------