[interpreters] replace tabs with spaces
[interpreters] replace tabs with spaces

 - add vim coda
 - remove trailing whitespace

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