Merge pull request #642 from Janrain-Colin/patch-3

fix typo in manual

docs/content/3.manual/manual.yml

@@ -1104,7 +1104,7 @@ sections:
           The filter `contains(b)` will produce true if b is
           completely contained within the input. A string B is
           contained in a string A if B is a substring of A. An array B
-          is contained in an array A is all elements in B are
+          is contained in an array A if all elements in B are
           contained in any element in A. An object B is contained in
           object A if all of the values in B are contained in the
           value in A with the same key. All other types are assumed to