Fix line endings in program.ts

src/compiler/program.ts

@@ -144,7 +144,7 @@ namespace ts {
         let program: Program;
         let files: SourceFile[] = [];
         let diagnostics = createDiagnosticCollection();
-
+
         let commonSourceDirectory: string;
         let diagnosticsProducingTypeChecker: TypeChecker;
         let noDiagnosticsTypeChecker: TypeChecker;
@@ -678,4 +678,4 @@ namespace ts {
             }
         }
     }
-}
+}