Remove trailing whitespace

Author: zoffixznet

doc/Language/functions.pod6

@@ -770,7 +770,7 @@ currently (2015.02) only implements them for subroutine parameters.
 
 X<|MAIN>
 
-The sub with the special name C<MAIN> is executed after all relevant phasers, 
+The sub with the special name C<MAIN> is executed after all relevant phasers,
 and its signature is the means by which command line arguments can be
 parsed. Multi methods are supported and a usage method is automatically
 generated and displayed if no command line arguments are provided. All command