Restore a single SP precedding the field value as this is preffered by RFC. This also restores doctest compatibility which is using wsgi 0.5.x series.
Restore a single SP precedding the field value as this is preffered by RFC. This also restores doctest compatibility which is using wsgi 0.5.x series.

sileht/python3-wsgi-intercept,cdent/wsgi-intercept