[euler] fixed a syntax error, and work around a gather/take bug
[euler] fixed a syntax error, and work around a gather/take bug

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