SA Message Headers loose it's formatting after HMS adds his own headers

[RvdHout]

Without hMailServer headers added to a message the SA added headers look like:

X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) * on
   Server * at Sun, 19 Jul 2015 08:13:19 +0200
X-Spam-Status: No, score=-7.1, hits=-7.1, required=4.0, autolearn=no
   autolearn_force=no, shortcircuit=no
X-Spam-Report: 
   * -6.0 USER_IN_WHITELIST_TO User is listed in 'whitelist_to'
   * -0.0 SPF_PASS SPF: sender matches SPF record
   *  0.8 PDF_ATTACHED BODY: email contains a PDF file attachment
   * -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%
   *      [score: 0.0000]

After hMailServer adds his headers like X-hMailServer-Spam, X-hMailServer-Reason etc. it looks like:

X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) * on Server * at Sun, 19
 Jul 2015 08:13:19 +0200
X-Spam-Status: Yes, score=5.4, hits=5.4, required=4.0, autolearn=no autolearn_force=no,
 shortcircuit=no
X-Spam-Level: *****
X-Spam-Report: *  0.7 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) *  1.5
 SUBJ_ALL_CAPS Subject is all capitals *  0.2 JAM_LONG_LINK BODY: Very long
 link in mail, possibly filled up with *      random words by bulk mailer *
 0.4 HTML_IMAGE_RATIO_02 BODY: HTML has a low ratio of text to image area *
  0.0 HTML_MESSAGE BODY: HTML included in message *  1.0 HTML_FONT_FACE_BAD
 BODY: HTML font face is not a word *  0.8 BAYES_50 BODY: Bayes spam
 probability is 40 to 60% *      [score: 0.4965] *  0.8 MPART_ALT_DIFF
 BODY: HTML and text parts are different
X-hMailServer-Spam: YES
X-hMailServer-Reason-1: Tagged as Spam by SpamAssassin - (Score: 5)
X-hMailServer-Reason-Score: 5

To be clear you understand what i mean, the linebreaks in the original X-Spam-Report header seem to have been removed by hmailserver (see above)

More info:
https://www.hmailserver.com/forum/viewtopic.php?p=177517#p177517

[RvdHout]

Hey @martinknafve I stumbled on a comment that hints it could be responsible for the header formatting to go completely haywire, I couldn't find a source < 2008-12-04, do you happen to know what exactly got changed? (eg: how te revert to old \t behavior?)