Add Failing Test

Issue: #177

src/test/extension.test.ts

@@ -51,6 +51,10 @@ describe("V2XmlFormatter", () => {
             testFormatter(xmlFormatter, options, "maintain-comment-formatting");
         });
 
+        it("should handle single-quotes in attributes", () => {
+            testFormatter(xmlFormatter, options, "single-quotes");
+        });
+
     });
 
 });

src/test/test-data/single-quotes.formatted.xml

@@ -0,0 +1,4 @@
+<root>
+  <element attr='1' />
+  <element attr='2' />
+</root>

src/test/test-data/single-quotes.unformatted.xml

@@ -0,0 +1,4 @@
+<root>
+  <element attr='1' />
+  <element attr='2' />
+</root>