Bug 1139004 - Rename all "Character Encoding" to "Text Encoding" in Help content; fix wording from changeset 3e9818b98a34 r=IanN a=CLOSED TREE a=Ratty for all branches.

suite/locales/en-US/chrome/common/help/nav_help.xhtml

@@ -1031,10 +1031,10 @@
 <p>If you browse, compose, or send and receive email in more than one language,
   you need to select the appropriate text encodings and fonts.</p>
 
-<p>A text encoding method is the way how characters in a document or message
-  are converted to data to be used by your computer. All web documents and
-  mail or news messages use a text encoding method (also known as a character
-  set, character coding, or charset).</p>
+<p>A text encoding method is the way characters in a document or message are
+  converted to data to be used by your computer. All web documents and mail or
+  news messages use a text encoding method (also known as a character set,
+  character coding, or charset).</p>
 
 <p>The text encoding method for a document may depend on its language.
   Some languages e.g. most West European languages, share the same encoding