Additional minor tweaks/cleanup to VERSIONING.rst.

Author: lizroth

VERSIONING.rst

@@ -8,12 +8,12 @@ We use a three-part X.Y.Z (Major.Minor.Patch) versioning definition, as follows:
 * **Y (Minor)** version changes are moderate changes. These include:
 
   * Significant non-breaking feature additions.
-  * Any change to the version of a package dependency.
+  * Any change to the version of a dependency.
   * Possible backwards-incompatible changes. These changes will be noted and explained in detail in the release notes.
 
 * **Z (Patch)** version changes are small changes. These changes will not break backwards compatibility.
 
-  * Z releases will also include warning of upcoming breaking changes, whenver possible.
+  * Z releases will also include warning of upcoming breaking changes, whenever possible.
 
 What this means for you
 =======================
@@ -25,7 +25,7 @@ We recommend running the most recent version. Here are our suggestions for manag
 
   * If you have good unit and integration tests, these changes are generally safe to pick up automatically.
 
-* Z changes will not to require any changes to your code. Z changes are intended to be picked up automatically.
+* Z changes will not require any changes to your code. Z changes are intended to be picked up automatically.
 
   * Good unit and integration tests are always recommended.