removed trailing whitespace in Doxygen files

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@52634 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/msgdlg.h

@@ -23,7 +23,7 @@ class wxMessageDialog : public wxDialog
 public:
     /**
         Constructor. Use ShowModal() to show the dialog.
-        
+
         @param parent
             Parent window.
         @param message
@@ -32,50 +32,50 @@ public:
             The dialog caption.
         @param style
             A dialog style (bitlist) containing flags chosen from the following:
-        
+
             wxOK
-        
+
             Show an OK button.
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+
             wxCANCEL
-        
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             Show a Cancel button.
-        
+
             wxYES_NO
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+
             Show Yes and No buttons.
-        
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             wxYES_DEFAULT
-        
+
             Used with wxYES_NO, makes Yes button the default - which is the default
         behaviour.
-        
+
             wxNO_DEFAULT
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             Used with wxYES_NO, makes No button the default.
-        
+
             wxICON_EXCLAMATION
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             Shows an exclamation mark icon.
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             wxICON_HAND
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             Shows an error icon.
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             wxICON_ERROR
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             Shows an error icon - the same as wxICON_HAND.
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             wxICON_QUESTION
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             Shows a question mark icon.
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             wxICON_INFORMATION
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+
             Shows an information (i) icon.
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+
             wxSTAY_ON_TOP
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+
             The message box stays on top of all other window, even those of the other
         applications (Windows only).
         @param pos