Improve 'svn commit' errormsg when inconsistent line-endings are found.
Improve 'svn commit' errormsg when inconsistent line-endings are found.

* libsvn_subr/subst.c 
  (svn_subst_copy_and_translate2):  wrap inconsistent newline error
  with a message that says *which* file has inconsistent newlines.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion