Remove all trailing spaces

No real changes, just clean up sources by removing trailing spaces from
all the non-generated files.

This should hopefully avoid future commits mixing significant changes
with insignificant whitespace ones.

include/wx/html/helpctrl.h

@@ -46,7 +46,7 @@ class WXDLLIMPEXP_HTML wxHtmlHelpController : public wxHelpControllerBase // wxE
 public:
     wxHtmlHelpController(int style = wxHF_DEFAULT_STYLE, wxWindow* parentWindow = NULL);
     wxHtmlHelpController(wxWindow* parentWindow, int style = wxHF_DEFAULT_STYLE);
-    
+
     virtual ~wxHtmlHelpController();
 
     void SetShouldPreventAppExit(bool enable);
@@ -117,7 +117,7 @@ public:
 
 protected:
     void Init(int style);
-    
+
     virtual wxWindow* CreateHelpWindow();
     virtual wxHtmlHelpFrame* CreateHelpFrame(wxHtmlHelpData *data);
     virtual wxHtmlHelpDialog* CreateHelpDialog(wxHtmlHelpData *data);

include/wx/html/webkit.h

@@ -107,11 +107,11 @@ private:
     wxString m_pageTitle;
 
     OSXWebViewPtr m_webView;
-    
+
     WX_NSObject m_frameLoadMonitor;
     WX_NSObject m_policyDelegate;
     WX_NSObject m_UIDelegate;
-    
+
     // we may use this later to setup our own mouse events,
     // so leave it in for now.
     void* m_webKitCtrlEventHandler;