Fix whitespace trimming
Fix whitespace trimming

Only try to remove any further whitespace in front of a line if the
first character of the line (the break character) is whitespace.

Addresses Issue 35.

torque/libass,grigorig/libass,xbmc/libass,stps/libass,mwgoldsmith/libass,xbmc/libass,sanyaade-g2g-repos/libass,tgoyne/libass,tgoyne/libass,Distrotech/libass,blinkseb/libass,MrSmile/libass,asimonov-im/libass,tgoyne/libass,astiob/libass,pigoz/libass-ct,astiob/libass,grigorig/libass,torque/libass,Akemi/libass,mwgoldsmith/libass,Distrotech/libass,sanyaade-g2g-repos/libass,Akemi/libass,Akemi/libass,libass/libass,sanyaade-g2g-repos/libass,Distrotech/libass,pigoz/libass-ct,richardpl/libass,ShiftMediaProject/libass,stps/libass,MrSmile/libass,ShiftMediaProject/libass,rhlee/libass,libass/libass,torque/libass,blinkseb/libass,rhlee/libass,mwgoldsmith/libass,richardpl/libass,rhlee/libass,stps/libass,blinkseb/libass,pigoz/libass-ct,asimonov-im/libass,richardpl/libass