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

acinclude.m4

@@ -23,7 +23,7 @@ ac_ext=mm
 ])
 
 dnl ===========================================================================
-dnl macros to find the a file in the list of include/lib paths
+dnl macros to find a file in the list of include/lib paths
 dnl ===========================================================================
 
 dnl ---------------------------------------------------------------------------
@@ -101,7 +101,7 @@ dnl after calling this function
 dnl ---------------------------------------------------------------------------
 AC_DEFUN([WX_LINK_PATH_EXIST],
 [
-  dnl never add -L/usr/libXXX explicitely to libpath
+  dnl never add -L/usr/libXXX explicitly to libpath
   if test "$1" = "default location"; then
     ac_path_to_link=""
   else
@@ -287,7 +287,7 @@ AC_TRY_RUN([main () {
 }], [ac_cv_c_bigendian=no], [ac_cv_c_bigendian=yes], [ac_cv_c_bigendian=unknown])
 fi])
 if test $ac_cv_c_bigendian = unknown; then
-  AC_MSG_WARN([Assuming little-endian target machine - this may be overriden by adding the line "ac_cv_c_bigendian=${ac_cv_c_bigendian='yes'}" to config.cache file])
+  AC_MSG_WARN([Assuming little-endian target machine - this may be overridden by adding the line "ac_cv_c_bigendian=${ac_cv_c_bigendian='yes'}" to config.cache file])
 fi
 if test $ac_cv_c_bigendian = yes; then
   AC_DEFINE(WORDS_BIGENDIAN)