parsing.c: Remove leading space from committer

This did not really break anything in the past since spaces are ignored
when rendering HTML. Remove the preceding space anyway to prevent from
potential future problems.

Signed-off-by: Lukas Fleischer <cgit@cryptocrack.de>
t0111: Additions and fixes

* Rename the capitalize-* filters to dump.* since they also dump the
  arguments.

* Add full argument validation to the email filters.

Signed-off-by: Lukas Fleischer <cgit@cryptocrack.de>