[99-problems] use .end instead of computing its value
[99-problems] use .end instead of computing its value

perl6/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples,Quinny/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,shlomif/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,Quinny/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,stmuk/perl6-examples,perl6/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,Quinny/perl6-examples,stmuk/perl6-examples