typos and stuff

Author: ryanflorence

UPGRADE_GUIDE.md

@@ -51,7 +51,7 @@ Also `.` is no longer matched in dynamic segments.
 <Route path="/file/:filename" />
 
 <!-- 0.6.x -->
-<Route path="/file/:filename.:ext?" />
+<Route path="/file/:filename.?:ext?" />
 
 <!--
   or for a looser match to allow for multiple `.` note that the data

docs/api/components/NotFoundRoute.md

@@ -1,7 +1,7 @@
 API: `NotFoundRoute` (component)
 ===============================
 
-When a parent's url partially matches, but none of the children do, a
+When a parent's URL partially matches, but none of the children do, a
 `NotFoundRoute` will be matched and its handler rendered at any level of
 your route/view hierarchy.
 
@@ -29,7 +29,8 @@ Example
 </Routes>
 ```
 
-The last `NotFoundRoute` will render inside the `App`, the first 
+The last `NotFoundRoute` will render inside the `App`, the first will
+rendering inside of `Course`.
 
   [routeProps]:/docs/api/components/Route.md#props
 

docs/guides/path-matching.md

@@ -37,15 +37,15 @@ parsed and available by name in your route handler on
 Splats
 ------
 
-Splats are defined with `*` and are available in your route handler as
+Splats are defined with `*` and will non-greedily match anything. The
+value will be available in your route handler as
 `this.props.params.splat`. If there are multiple, you'll get an array of
 values.
 
 Question Mark
 -------------
 
-Question marks will optionally match the preceeding segment
-non-greedily.
+Question marks will optionally match the preceeding segment.
 
 Examples
 --------