remove duplicate word

doc/Language/5to6-perlfunc.rakudoc

@@ -436,7 +436,7 @@ You can use C<%hash.kv> which
 returns a list of keys and values. example:
 C«for %hash.kv -> $k, $v { say "$k: $v" }».
 However Raku offers more possibilities, C<%hash.pairs> gives you each Pair object as
-as an entity, and C<%hash.antipairs> does the same with the keys and values reversed.
+an entity, and C<%hash.antipairs> does the same with the keys and values reversed.
 
 Incidentally, what we have there with the C«->» is called a pointy
 block and, though there are a number of examples in the documentation,