Added check for trailing whitespaces and corrected existing violations.

test/mjsunit/mirror-script.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 44 matching lines @@
     assertEquals(file_lines, mirror.lineCount());
   }
   assertEquals(type, mirror.scriptType());
   assertEquals(compilation_type, mirror.compilationType(), "compilation type");
   if (source) {
     assertEquals(source, mirror.source());
   }
   if (eval_from_line) {
     assertEquals(eval_from_line,  mirror.evalFromLocation().line);
   }
-  
+
   // Parse JSON representation and check.
   var fromJSON = JSON.parse(json);
   assertEquals('script', fromJSON.type);
   name = fromJSON.name;
   if (name) {
     assertEquals(file_name, name.substring(name.length - file_name.length));
   } else {
     assertTrue(file_name === null);
   }
   assertEquals(0, fromJSON.lineOffset);
@@ skipping 13 matching lines @@
 testScriptMirror(eval('(function(){\n  })'), null, 2, 2, 1, '(function(){\n  })', 88);
 
 // Test taking slices of source.
 var mirror = debug.MakeMirror(eval('(function(){\n  1;\n})')).script();
 assertEquals('(function(){\n', mirror.sourceSlice(0, 1).sourceText());
 assertEquals('  1;\n', mirror.sourceSlice(1, 2).sourceText());
 assertEquals('})', mirror.sourceSlice(2, 3).sourceText());
 assertEquals('(function(){\n  1;\n', mirror.sourceSlice(0, 2).sourceText());
 assertEquals('  1;\n})', mirror.sourceSlice(1, 3).sourceText());
 assertEquals('(function(){\n  1;\n})', mirror.sourceSlice(0, 3).sourceText());