Fix translations for collections and drop useless try.

Fix translations for collections and drop useless try.

Don't do:  _("With some value: %s" % value)
Please do: _("WIth some value: %s") % value

Fixed for collection messages.

Also removed a
  try:
    some_code.
  except Exception as e:
    raise

No point in doing that.

Fixing the indentation of some_code comes in an extra
commit, because changing indentation is annoying enough
alone, so don't mix it with other changes.