fixed test code for escaping '='.

Author: tsudukim

launcher/src/test/java/org/apache/spark/launcher/CommandBuilderUtilsSuite.java

@@ -74,7 +74,7 @@ public void testWindowsBatchQuoting() {
     assertEquals("\"a b c\"", quoteForBatchScript("a b c"));
     assertEquals("\"a \"\"b\"\" c\"", quoteForBatchScript("a \"b\" c"));
     assertEquals("\"a\"\"b\"\"c\"", quoteForBatchScript("a\"b\"c"));
-    assertEquals("\"ab^=\"\"cd\"\"\"", quoteForBatchScript("ab=\"cd\""));
+    assertEquals("\"ab=\"\"cd\"\"\"", quoteForBatchScript("ab=\"cd\""));
     assertEquals("\"a,b,c\"", quoteForBatchScript("a,b,c"));
     assertEquals("\"a;b;c\"", quoteForBatchScript("a;b;c"));
     assertEquals("\"a,b,c\\\\\"", quoteForBatchScript("a,b,c\\"));