Tidy public/ directory.

public/fpdf_ppo.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
- 
+
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#ifndef _FPDFPPO_H_
-#define _FPDFPPO_H_
+#ifndef PUBLIC_FPDF_PPO_H_
+#define PUBLIC_FPDF_PPO_H_
 
 #include "fpdfview.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 // Function: FPDF_ImportPages
-//                      Import some pages to a PDF document.
-// Parameters:  
-//                      dest_doc        -       The destination document which add the pages.
-//                      src_doc         -       A document to be imported.
-//                      pagerange       -       A page range string, Such as "1,3,5-7". 
-//                                                      If this parameter is NULL, it would import all pages in src_doc.
-//                      index           -       The page index wanted to insert from.   
+//          Import some pages to a PDF document.
+// Parameters:
+//          dest_doc    -   The destination document which add the pages.
+//          src_doc     -   A document to be imported.
+//          pagerange   -   A page range string, Such as "1,3,5-7".
+//                          If this parameter is NULL, it would import all pages in src_doc.
+//          index       -   The page index wanted to insert from.
 // Return value:
-//                      TRUE for succeed, FALSE for Failed.     
+//          TRUE for succeed, FALSE for Failed.
 DLLEXPORT FPDF_BOOL STDCALL FPDF_ImportPages(FPDF_DOCUMENT dest_doc,FPDF_DOCUMENT src_doc, FPDF_BYTESTRING pagerange, int index);
 
 
 // Function: FPDF_CopyViewerPreferences
-//                      Copy the viewer preferences from one PDF document to another.#endif
-// Parameters:  
-//                      dest_doc        -       Handle to document to write the viewer preferences to.
-//                      src_doc         -       Handle to document with the viewer preferences.
+//          Copy the viewer preferences from one PDF document to another.#endif
+// Parameters:
+//          dest_doc    -   Handle to document to write the viewer preferences to.
+//          src_doc     -   Handle to document with the viewer preferences.
 // Return value:
-//                      TRUE for success, FALSE for failure.
+//          TRUE for success, FALSE for failure.
 DLLEXPORT FPDF_BOOL STDCALL FPDF_CopyViewerPreferences(FPDF_DOCUMENT dest_doc, FPDF_DOCUMENT src_doc);
 
 #ifdef __cplusplus
-};
+}
 #endif
 
-#endif //_FPDFPPO_H_
-
+#endif  // PUBLIC_FPDF_PPO_H_