Minor reword of multi method documentation

Close #2026

Author: fluca1978

doc/Language/functions.pod6

@@ -223,9 +223,9 @@ sub bar() returns Int { return }; bar; # Nil returned
 
 =head2 X<Multi-dispatch|declarator,multi>
 
-Perl 6 allows you to write several routines with the same name but different
+Perl 6 allows for writing several routines with the same name but different
 signatures. When the routine is called by name, the runtime environment
-determines the proper I<candidate> and calls it.
+determines the proper I<candidate> and invokes it.
 
 Each candidate is declared with the C<multi> keyword. Dispatch happens depending
 on the number (L<arity|/type/Routine#(Code)_method_arity>), type and name of arguments.