Copy edits for typos

docs/devel/api-conventions.md

@@ -403,7 +403,7 @@ Using the `omitempty` tag causes swagger documentation to reflect that the field
 
 Using a pointer allows distinguishing unset from the zero value for that type.
 There are some cases where, in principle, a pointer is not needed for an optional field
-since the zero value is forbidden, and thus imples unset.   There are examples of this in the
+since the zero value is forbidden, and thus implies unset.   There are examples of this in the
 codebase.  However:
 
 - it can be difficult for implementors to anticipate all cases where an empty value might need to be

docs/devel/api_changes.md

@@ -558,7 +558,7 @@ New feature development proceeds through a series of stages of increasing maturi
 
 - Development level
   - Object Versioning: no convention
-  - Availability: not commited to main kubernetes repo, and thus not available in offical releases
+  - Availability: not committed to main kubernetes repo, and thus not available in official releases
   - Audience: other developers closely collaborating on a feature or proof-of-concept
   - Upgradeability, Reliability, Completeness, and Support: no requirements or guarantees
 - Alpha level
@@ -590,7 +590,7 @@ New feature development proceeds through a series of stages of increasing maturi
     tests complete; the API has had a thorough API review and is thought to be complete, though use
     during beta may frequently turn up API issues not thought of during review
   - Upgradeability: the object schema and semantics may change in a later software release; when
-    this happens, an upgrade path will be documentedr; in some cases, objects will be automatically
+    this happens, an upgrade path will be documented; in some cases, objects will be automatically
     converted to the new version; in other cases, a manual upgrade may be necessary;  a manual
     upgrade may require downtime for anything relying on the new feature, and may require
     manual conversion of objects to the new version; when manual conversion is necessary, the

docs/devel/automation.md

@@ -35,7 +35,7 @@ Documentation for other releases can be found at
 
 ## Overview
 
-Kubernetes uses a variety of automated tools in an attempt to relieve developers of repeptitive, low
+Kubernetes uses a variety of automated tools in an attempt to relieve developers of repetitive, low
 brain power work.  This document attempts to describe these processes.