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/chkconf.h

@@ -21,10 +21,10 @@
     If you get an error saying "wxUSE_FOO must be defined", it means that you
     are not using the correct up-to-date version of setup.h. This happens most
     often when using svn or daily snapshots and a new symbol was added to
-    setup0.h and you haven't updated your local setup.h to to reflect it. If
+    setup0.h and you haven't updated your local setup.h to reflect it. If
     this is the case, you need to propagate the changes from setup0.h to your
     setup.h and, if using makefiles under MSW, also remove setup.h under the
-    build directory (lib/$(COMPILER)_{lib,dll}/msw[u][d][dll]/wx) so that it
+    build directory (lib/$(COMPILER)_{lib,dll}/msw[u][d][dll]/wx) so that
     the new setup.h is copied there.
 
     If you get an error of the form "wxFoo requires wxBar", then the settings