Delete invalid characters in function names when using `svn diff -x -p`.
Delete invalid characters in function names when using `svn diff -x -p`.

* subversion/libsvn_diff/diff_file.c
  (output_unified_diff_modified): Delete invalid characters in function names.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@875520 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion