remove trailing whitespace

Author: coke

doc/Language/traps.pod6

@@ -184,10 +184,10 @@ The common areas you should watch out for are:
 =begin code :skip-test
     # WRONG; trying to hash-slice a Bool:
     while ($++ > 5){ .say }
-    
+
     # RIGHT:
     while ($++ > 5) { .say }
-    
+
     # EVEN BETTER; Perl 6 does not require parentheses there:
     while $++ > 5 { .say }
 =end code
@@ -197,15 +197,15 @@ The common areas you should watch out for are:
 =begin code :skip-test
     # WRONG; ambiguity with `[<]` meta op:
     my @a = [[<foo>],];
-    
+
     # RIGHT; reductions cannot have spaces in them, so put one in:
-    my @a = [[ <foo>],]; 
-      
+    my @a = [[ <foo>],];
+
     # No ambiguity here, natural spaces between items suffice to resolve it:
-    my @a = [[<foo bar ber>],]; 
+    my @a = [[<foo bar ber>],];
 =end code
 
-=head3 
+=head3
 
 =head1 Captures