Modernize Fletcher.pl
Modernize Fletcher.pl

Just adding P6-isms here and there.

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