Fixes bad pod

Author: JJ

doc/Language/hashmap.pod6

@@ -169,6 +169,7 @@ C<%h<e>> will point to a C<Pair> which will have these consequences:
 my %h =  e => f => 'g';
 %h<e><q> = 'k';
 # OUTPUT: «(exit code 1) Pair␤Cannot modify an immutable Str (Nil)␤  in block <unit>»
+=end code
 
 This, however, will effectively define a nested hash: