contrib: change return value of file checking function of check-code.py
This is a part of preparation to apply checking with check-code.py on
code fragments embedded in *.t test scripts.
After this patch, caller of _checkfiledata() can count number of
errors in each code fragments of an actual file.
This will be useful to share --per-file limitation by all embedded
code fragments.
#require docutils gettext
$ $TESTDIR/check-gendoc de
checking for parse errors
Die Dateien werden dem Projektarchiv beim n\xc3\xa4chsten \xc3\x9cbernehmen (commit) hinzugef\xc3\xbcgt. Um dies vorher r\xc3\xbcckg\xc3\xa4ngig zu machen, siehe:hg:`forget`. (esc)
warning: please have a space before :hg: