Grammar correction

JJ · JJ · commit 0927fc50aa13 · 2018-05-17T07:47:21.000+02:00
diff --git a/doc/Language/traps.pod6 b/doc/Language/traps.pod6
@@ -1369,7 +1369,7 @@ L<filenames that begin with hyphens|http://mywiki.wooledge.org/BashPitfalls#File
 
 =head1 Scope
 
-=head2 Using a C<once> block
+=head2 Using an C<once> block
 
 The C<once> block is a block of code that will only run once when its parent block is run. As an example:
 
