Remove carriage returns from LayoutTests (18)

LayoutTests/ietestcenter/Javascript/TestCases/15.7.3.1-2.js

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@@ skipping 18 matching lines @@
 test: function testcase() {
   // assume that Number.prototype has not been modified.
   return Object.getPrototypeOf(new Number(42))===Number.prototype;
  },
 
 precondition: function prereq() {
   return fnExists(Object.getPrototypeOf);
  }
 
 });