fixed docopt test on Linux

Author: samdeane

Tests/DocoptTests/DocoptTests.swift

@@ -341,11 +341,7 @@ class DocoptTests: XCTestCase {
         let doc = "Usage: prog [-v] A\n\n           Options: -v  Be verbose."
         let result = Docopt(doc, argv: ["arg"]).result
         let fixture : [String:Any] = ["-v": false, "A": "arg"]
-        for (key, value) in result!
-        {
-            XCTAssertEqual(value as! NSObject, fixture[key]! as! NSObject)
-        }
-        XCTAssertEqual(result!.count, fixture.count)
+        XCTAssertTrue(valuesMatch(result, fixture))
     }
 
     static var allTests = [