fix issue #559: to json -r serializes datetime without spaces (#596)

* fix issue #559: to json -r serializes datetime without spaces

* add in a third test which checks spaces in both keys and values

* fix clippy error

src/tests/test_converters.rs

@@ -15,9 +15,25 @@ fn from_json_2() -> TestResult {
 }
 
 #[test]
-fn to_json_raw_flag() -> TestResult {
+fn to_json_raw_flag_1() -> TestResult {
     run_test(
         "[[a b]; [jim susie] [3 4]] | to json -r",
-        r#"[{"a":"jim","b":"susie"},{"a":3,"b":4}]"#,
+        r#"[{"a": "jim","b": "susie"},{"a": 3,"b": 4}]"#,
+    )
+}
+
+#[test]
+fn to_json_raw_flag_2() -> TestResult {
+    run_test(
+        "[[\"a b\" c]; [jim susie] [3 4]] | to json -r",
+        r#"[{"a b": "jim","c": "susie"},{"a b": 3,"c": 4}]"#,
+    )
+}
+
+#[test]
+fn to_json_raw_flag_3() -> TestResult {
+    run_test(
+        "[[\"a b\" \"c d\"]; [\"jim smith\" \"susie roberts\"] [3 4]] | to json -r",
+        r#"[{"a b": "jim smith","c d": "susie roberts"},{"a b": 3,"c d": 4}]"#,
     )
 }