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.

interface/wx/html/helpctrl.h

@@ -269,7 +269,7 @@ public:
     wxHtmlHelpDialog* GetDialog();
 
 
-    
+
 protected:
 
     /**

interface/wx/html/helpdata.h

@@ -20,7 +20,7 @@ public:
     wxString GetTitle() const;
     wxString GetStart() const;
     wxString GetBasePath() const;
-    
+
     /* SetContentsRange: store in the bookrecord where in the index/contents lists the
      * book's records are stored. This to facilitate searching in a specific book.
      * This code will have to be revised when loading/removing books becomes dynamic.

interface/wx/html/htmlcell.h

@@ -8,7 +8,7 @@
 
 /**
    @class wxHtmlRenderingStyle
- 
+
    wxHtmlSelection is data holder with information about text selection.
    Selection is defined by two positions (beginning and end of the selection)
    and two leaf(!) cells at these positions.

interface/wx/html/htmprint.h

@@ -136,15 +136,15 @@ public:
         Sets font sizes to be relative to the given size or the system
         default size; use either specified or default font
 
-        @param size 
+        @param size
             Point size of the default HTML text
         @param normal_face
-            This is face name for normal (i.e. non-fixed) font. It can be 
-            either empty string (then the default face is chosen) or 
-            platform-specific face name. Examples are "helvetica" under 
+            This is face name for normal (i.e. non-fixed) font. It can be
+            either empty string (then the default face is chosen) or
+            platform-specific face name. Examples are "helvetica" under
             Unix or "Times New Roman" under Windows.
         @param fixed_face
-            The same thing for fixed face ( \<TT\>..\</TT\> ) 
+            The same thing for fixed face ( \<TT\>..\</TT\> )
 
         @see SetSize()
     */
@@ -301,7 +301,7 @@ public:
     */
     void SetFonts(const wxString& normal_face, const wxString& fixed_face,
                   const int* sizes = NULL);
-  
+
     /**
         Sets the name used for preview frames and setup dialogs.
 
@@ -310,7 +310,7 @@ public:
     void SetName(const wxString& name);
 
     /**
-        Sets default font sizes and/or default font size. 
+        Sets default font sizes and/or default font size.
         See wxHtmlDCRenderer::SetStandardFonts for detailed description.
         @see SetFonts()
     */

interface/wx/html/webkit.h

@@ -35,7 +35,7 @@ public:
                     const wxSize& size = wxDefaultSize, long style = 0,
                     const wxValidator& validator = wxDefaultValidator,
                  const wxString& name = wxWebKitCtrlNameStr);
-    
+
     bool Create(wxWindow *parent,
                 wxWindowID winid,
                 const wxString& strURL,