Replace tabs by spaces in pretty printing

[strongX509]

Hi,
currently tabs ('\t') are used to indent the xml tags in pretty printing mode. The tabs are sanitized by the strongSwan log to #11 which looks rather ugly. Would it be possible to use an indentation of two space characters as a replacement for a tab character?

Andreas

[cfaessler]

I commited the change into the branch https://github.com/tnc-ba/swidGenerator/tree/tag-visitor.
But the branch is still in review. We plan to merge it into the master branch this weekend.

Regards
Christian