style definitions containing blanks and/or linefeed between <darktable_style version="1.0"> and <info> tags can't be imported

[MStraeten]

see https://discuss.pixls.us/t/dt-import-a-style-how-hard-can-it-be/28387/32

styles provided by https://github.com/jade-nl/dt.styles/releases/tag/v1.7 contains linefeeds and blanks between <darktable_style version="1.0">and tag - so importing them results in
22,676848 [styles] file /tmp/dt.styles-master/Fuji/XTrans III Velvia.dtstyle is malformed style file
removing \n and following blanks results in an importable style file.

<darktable_style version="1.0"> must be written without linefeed or blank in between.
linfeeds or blanks later

To Reproduce

1. Download a style from that source or save an own style and insert a blank or linefeed between <darktable_style version="1.0"> and in the resulting file.
2. import style from lighttable style import dialog
3. See error - nothing happens

Expected behavior
linefeeds and blanks shouldn’t matter in xml files outside elements

Platform

• darktable version : darktable 3.9.0+44~gb2e504e76
• OS : OSx

[jade-nl]

Confirmed.

darktable: 3.9.0+6~gc6e8ed544
OS: Linux (Debian)