Fix a misleading error message.
Fix a misleading error message.

* subversion/libsvn_subr/io.c
  (svn_io_read_link): Fix error message to indicate what we actually tried to
  do.  Trivial comment fix.

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