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

include/wx/osx/core/cfdataref.h

@@ -40,7 +40,7 @@ public:
         @param p        The raw pointer to assume ownership of.  May be NULL.
         @discussion Like shared_ptr, it is assumed that the caller has a strong reference to p and intends
                     to transfer ownership of that reference to this ref holder.  If the object comes from
-                    a Create or Copy method then this is the correct behavior.  If the object comes from
+                    a Create or Copy method then this is the correct behaviour.  If the object comes from
                     a Get method then you must CFRetain it yourself before passing it to this constructor.
                     A handy way to do this is to use the non-member wxCFRefFromGet factory funcion.
                     This method is templated and takes an otherType *p.  This prevents implicit conversion