remove trailing ws

Author: coke

doc/Language/modules.pod6

@@ -32,7 +32,7 @@ N<As L<synopsis S11|https://design.perl6.org/S11.html#Units> says: Confusing? Ye
 directory for executable programs and scripts.
 
 Source files generally use the C<.pm6> extension, and scripts or
-executables use the C<.p6>. Test files use the C<.t> extension. Files which contain documentation use the C<.pod6> extension. 
+executables use the C<.p6>. Test files use the C<.t> extension. Files which contain documentation use the C<.pod6> extension.
 
 =head2 Loading and Basic Importing