plugins/_transforms: allow spaces at the beginning of transform
plugins/_transforms: allow spaces at the beginning of transform

pgherveou/svgo,svg/svgo,allypalanzi/svgo,jagan-veeraraghavan/svgo,ennett50/svgo,ricardobeat/svgo,subzey/svgo,svg/svgo,pieter-lazzaro/svgo,akatopo/svgo,PeterWangPo/svgo,ben-eb/svgo,bORm/svgo,WebTwist/svgo,OrangeLV/svgo