explode trace on newline, so trace is returned in an array & is more readable (#4)

* make exception trace an array so it is more readable
* update readme.md

Author: avandenbogaert

README.md

@@ -63,15 +63,25 @@ new ExceptionApiProblem(new \Exception('message', 500));
     "code": 500,
     "line": 23,
     "file": "exception.php",
-    "trace": "#0 [internal function]: ...",
+    "trace": [
+         "#0 [internal function]: ...",
+         "#1 [internal function]: ...",
+         "#3 [internal function]: ...",
+         "..."
+    ],
     "previous": [
       {
         "message": "previous",
         "type": "InvalidArgumentException",
         "code": 0,
         "line": 20,
         "file": "exception.php",
-        "trace": "#0 [internal function]: ..."
+        "trace": [
+            "#0 [internal function]: ...",
+            "#1 [internal function]: ...",
+            "#3 [internal function]: ...",
+            "..."
+        ]
       }
     ]
   }

spec/Http/ExceptionApiProblemSpec.php

@@ -70,7 +70,7 @@ public function it_can_parse_to_debuggable_array(): void
                 'code' => 500,
                 'line' => $exception->getLine(),
                 'file' => $exception->getFile(),
-                'trace' => $exception->getTraceAsString(),
+                'trace' => explode("\n", $exception->getTraceAsString()),
                 'previous' => [],
             ],
         ]);
@@ -94,23 +94,23 @@ public function it_contains_flattened_previous_exceptions_in_debuggable_output()
                 'code' => 0,
                 'line' => $exception->getLine(),
                 'file' => $exception->getFile(),
-                'trace' => $exception->getTraceAsString(),
+                'trace' => explode("\n", $exception->getTraceAsString()),
                 'previous' => [
                     [
                         'type' => Exception::class,
                         'message' => 'previous',
                         'code' => 2,
                         'line' => $previous->getLine(),
                         'file' => $previous->getFile(),
-                        'trace' => $previous->getTraceAsString(),
+                        'trace' => explode("\n", $previous->getTraceAsString()),
                     ],
                     [
                         'type' => Exception::class,
                         'message' => 'first',
                         'code' => 1,
                         'line' => $first->getLine(),
                         'file' => $first->getFile(),
-                        'trace' => $first->getTraceAsString(),
+                        'trace' => explode("\n", $first->getTraceAsString()),
                     ],
                 ],
             ],

src/Http/ExceptionApiProblem.php

@@ -56,7 +56,7 @@ private function serializeException(Throwable $throwable): array
             'code' => $throwable->getCode(),
             'line' => $throwable->getLine(),
             'file' => $throwable->getFile(),
-            'trace' => $throwable->getTraceAsString(),
+            'trace' => explode("\n", $throwable->getTraceAsString()),
         ];
     }
 }