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/dc.h

@@ -550,7 +550,7 @@ public:
     void DrawRectangle(const wxRect& rect);
 
     /**
-        Draws the text rotated by @a angle degrees 
+        Draws the text rotated by @a angle degrees
         (positive angles are counterclockwise; the full angle is 360 degrees).
 
         Notice that, as with DrawText(), the @a text can contain multiple lines
@@ -980,10 +980,10 @@ public:
     int GetBackgroundMode() const;
 
     /**
-        Gets the current font. 
-        
-        Notice that even although each device context object has some default font 
-        after creation, this method would return a ::wxNullFont initially and only 
+        Gets the current font.
+
+        Notice that even although each device context object has some default font
+        after creation, this method would return a ::wxNullFont initially and only
         after calling SetFont() a valid font is returned.
     */
     const wxFont& GetFont() const;
@@ -1014,17 +1014,17 @@ public:
 
     /**
         @a mode may be one of @c wxPENSTYLE_SOLID and @c wxPENSTYLE_TRANSPARENT.
-        
-        This setting determines whether text will be drawn with a background 
+
+        This setting determines whether text will be drawn with a background
         colour or not.
     */
     void SetBackgroundMode(int mode);
 
     /**
-        Sets the current font for the DC. 
+        Sets the current font for the DC.
 
-        If the argument is ::wxNullFont (or another invalid font; see wxFont::IsOk), 
-        the current font is selected out of the device context (leaving wxDC without 
+        If the argument is ::wxNullFont (or another invalid font; see wxFont::IsOk),
+        the current font is selected out of the device context (leaving wxDC without
         any valid font), allowing the current font to be destroyed safely.
 
         @see wxFont
@@ -1045,9 +1045,9 @@ public:
     void SetTextForeground(const wxColour& colour);
 
     /**
-        Sets the current layout direction for the device context. 
-        
-        @param dir 
+        Sets the current layout direction for the device context.
+
+        @param dir
            May be either @c wxLayout_Default, @c wxLayout_LeftToRight or
            @c wxLayout_RightToLeft.
 
@@ -1333,8 +1333,8 @@ public:
     /**
         Sets the current brush for the DC.
 
-        If the argument is ::wxNullBrush (or another invalid brush; see wxBrush::IsOk), 
-        the current brush is selected out of the device context (leaving wxDC without 
+        If the argument is ::wxNullBrush (or another invalid brush; see wxBrush::IsOk),
+        the current brush is selected out of the device context (leaving wxDC without
         any valid brush), allowing the current brush to be destroyed safely.
 
         @see wxBrush, wxMemoryDC (for the interpretation of colours when
@@ -1343,10 +1343,10 @@ public:
     void SetBrush(const wxBrush& brush);
 
     /**
-        Sets the current pen for the DC. 
+        Sets the current pen for the DC.
 
-        If the argument is ::wxNullPen (or another invalid pen; see wxPen::IsOk), 
-        the current pen is selected out of the device context (leaving wxDC without any 
+        If the argument is ::wxNullPen (or another invalid pen; see wxPen::IsOk),
+        the current pen is selected out of the device context (leaving wxDC without any
         valid pen), allowing the current pen to be destroyed safely.
 
         @see wxMemoryDC for the interpretation of colours when drawing into a
@@ -1592,7 +1592,7 @@ public:
 
     //@}
 
-    
+
     /**
         @name query capabilities
     */
@@ -1607,7 +1607,7 @@ public:
        Does the DC support calculating the size required to draw text?
     */
     bool CanGetTextExtent() const;
-    
+
     //@}
 
     /**
@@ -1620,12 +1620,12 @@ public:
        wxGCDC then the return value will be the value returned from
        wxGraphicsContext::GetNativeContext.  A value of NULL is returned if
        the DC does not have anything that fits the handle concept.
-       
+
        @since 2.9.5
      */
     void* GetHandle() const;
 
-    
+
     /**
        If supported by the platform and the type of DC, fetch the contents of the DC, or a subset of it, as a bitmap.
     */