These lines in buffs.lua cause a massive taint with anything that uses the strings in UIparent.xml. I suggest to make a custom time format if you want the gap removed.

HOUR_ONELETTER_ABBR = "%dh"
DAY_ONELETTER_ABBR = "%dd"
MINUTE_ONELETTER_ABBR = "%dm"
SECOND_ONELETTER_ABBR = "%ds"