Merge pull request #301 from leifwickland/patch-1

Fix a typo.

Author: heathermiller

overviews/reflection/typetags-manifests.md

@@ -39,7 +39,7 @@ Like `Manifest`s, `TypeTag`s are always generated by the compiler, and can be ob
 
 ### via the Methods `typeTag`, `classTag`, or `weakTypeTag`
 
-Once can directly obtain a `TypeTag` for a specific type by simply using
+One can directly obtain a `TypeTag` for a specific type by simply using
 method `typeTag`, available through `Universe`.
 
 For example, to obtain a `TypeTag` which represents `Int`, we can do: