Fixed various typos.

Applied patch by snowleopard2 fixing a bunch of typos such as misspellings and double words in the documentation. Combined the patch with some local queued typos waiting to be committed as well as adding new typo fixes inspired by the patch.

Function names with American spelling were not changed nor was third-party code touched. The only code changes involve some changes in strings that are translated ("Can not" -> "Cannot").

Closes #13063 (again).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67280 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/benchmarks/htmlparser/htmlpars.h

@@ -136,15 +136,15 @@ protected:
                           wx28HtmlTagsCache *cache);
 
     // Adds text to the output.
-    // This is called from Parse() and must be overriden in derived classes.
+    // This is called from Parse() and must be overridden in derived classes.
     // txt is not guaranteed to be only one word. It is largest continuous part of text
     // (= not broken by tags)
     // NOTE : using char* because of speed improvements
     virtual void AddText(const wxChar* txt) = 0;
 
     // Adds tag and proceeds it. Parse() may (and usually is) called from this method.
-    // This is called from Parse() and may be overriden.
-    // Default behavior is that it looks for proper handler in m_Handlers. The tag is
+    // This is called from Parse() and may be overridden.
+    // Default behaviour is that it looks for proper handler in m_Handlers. The tag is
     // ignored if no hander is found.
     // Derived class is *responsible* for filling in m_Handlers table.
     virtual void AddTag(const wx28HtmlTag& tag);