Fix wxHtmlHelpData::SetTempDir() to behave correctly without trailing slash.

The path passed to this function is always a directory, so use
wxFileName::AssignDir() instead of the default constructor of wxFileName which
considers the name to be a name of a file unless it ends with a path separator.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74696 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/stc/stctest.cpp

@@ -555,7 +555,7 @@ void AppFrame::CreateMenu ()
 
     // Help menu
     wxMenu *menuHelp = new wxMenu;
-    menuHelp->Append (wxID_ABOUT, _("&About ..\tShift+F1"));
+    menuHelp->Append (wxID_ABOUT, _("&About ..\tCtrl+D"));
 
     // construct menu
     m_menuBar->Append (menuFile, _("&File"));