Run pylint on find-german-comments

I ran pylint and corrected the following errors:

* W: 39,0: Unnecessary semicolon
* W:177,0: Bad indentation. Found 19 spaces, expected 20
* W:178,0: Bad indentation. Found 19 spaces, expected 20
* W:213,0: Unnecessary semicolon
* W: 65,8:Parser.get_comments: Unused variable 'linenum'
* C:190,28:Parser.check_file: Operator not preceded by a space
* C:192,24:Parser.check_file: Operator not followed by a space
* C:196,24:Parser.check_file: Comma not followed by a space
* W:223,33:Parser.check_source_files: Redefining built-in 'dir'

Change-Id: Idd4986fecb7b3a2af87d1062b7d08c6c87b9f80f
Reviewed-on: https://gerrit.libreoffice.org/10475
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>