Update keyaddrtest to be valid JSON

keyaddrtest.json

@@ -4,9 +4,9 @@
         "key": "c85ef7d79691fe79573b1a7064c19c1a9819ebdbd1faaab1a8ec92344438aaf4",
         "addr": "cd2a3d9f938e13cd947ec05abc7fe734df8dd826",
         "sig_of_emptystring": {
-            v: 27,
+            "v": 27,
-            r: 55022946425863772466282515086640833500580355555249003729267710149987842051473,
+            "r": 55022946425863772466282515086640833500580355555249003729267710149987842051473,
-            s: 3021698389129950584349170550428805649435913935175976180112863059249983907949
+            "s": 3021698389129950584349170550428805649435913935175976180112863059249983907949
         }
     },
     {
@@ -14,9 +14,9 @@
         "key": "c87f65ff3f271bf5dc8643484f66b200109caffe4bf98c4cb393dc35740b28c0",
         "addr": "13978aee95f38490e9769c39b2773ed763d9cd5f",
         "sig_of_emptystring": {
-            v: 28,
+            "v": 28,
-            r: 20570452350081260599473412372903969148670549754219103025003129053348571714359,
+            "r": 20570452350081260599473412372903969148670549754219103025003129053348571714359,
-            s: 76892551129780267788164835941580941601518827936179476514262023835864819088004
+            "s": 76892551129780267788164835941580941601518827936179476514262023835864819088004
         }
     }
 ]