Do not add newline to test body Lines

This is needed to test edge cases like a body missing the final newline,
for example:

[
  "a\r\n",
  "b\r"
]

And it is clearer than to add implicit newline to each line except the
final line.

Author: hnakamur

test/regression/regression_test.cc

@@ -48,7 +48,7 @@ inline std::string RegressionTest::yajl_array_to_str(const yajl_val &node) {
     for (int z = 0; z < node->u.array.len; z++) {
         yajl_val val3 = node->u.array.values[z];
         const char *key = YAJL_GET_STRING(val3);
-        i << key << "\n";
+        i << key;
     }
     return i.str();
 }