Remove trailing whitespaces.
Remove trailing whitespaces.

This really closes #1739 and tip'o'the hat to @coke who usually takes
care of this.

tbrowder/doc,MasterDuke17/doc,antquinonez/doc,MasterDuke17/doc,stmuk/doc,antquinonez/doc,dmaestro/doc,perl6/doc,stmuk/doc,dmaestro/doc,tbrowder/doc,stmuk/doc,perl6/doc,perl6/doc,dmaestro/doc,stmuk/doc,MasterDuke17/doc,tbrowder/doc,antquinonez/doc,jonathanstowe/doc,perl6/doc,antquinonez/doc,stmuk/doc,jonathanstowe/doc,jonathanstowe/doc,antquinonez/doc,dmaestro/doc,tbrowder/doc,MasterDuke17/doc,jonathanstowe/doc,jonathanstowe/doc,dmaestro/doc,perl6/doc