applied typos and spelling error fixes patch from Olly Betts

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15779 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/filesys.tex

@@ -95,7 +95,7 @@ Returns actual path (set by \helpref{ChangePathTo}{wxfilesystemchangepathto}).
 \func{wxString}{FindFirst}{\param{const wxString\& }{wildcard}, \param{int }{flags = 0}}
 
 Works like \helpref{wxFindFirstFile}{wxfindfirstfile}. Returns name of the first
-filename (withing filesystem's current path) that matches {\it wildcard}. {\it flags} may be one of
+filename (within filesystem's current path) that matches {\it wildcard}. {\it flags} may be one of
 wxFILE (only files), wxDIR (only directories) or 0 (both).
 
 \membersection{wxFileSystem::FindNext}\label{wxfilesystemfindnext}