Out: fix escaping of curl commands

Issue GH-359

Author: SMillerDev

src/PHPDraft/Out/HTML/default/transition.twig

@@ -35,7 +35,7 @@
                            data-placement="left"
                            data-toggle="popover"
                            data-html="true"
-                           data-content="<textarea rows='8' cols='75'>{{ transition.get_curl_command(data.HOST)|raw }}</textarea>">
+                           data-content="<textarea rows='8' cols='75'>{{ transition.get_curl_command(data.HOST) }}</textarea>">
                             <span class="fas fa-copy"></span>
                         </a>
                         <h5>Example URI</h5>

src/PHPDraft/Out/HTML/material/transition.twig

@@ -30,7 +30,7 @@
                             <div id="modal-{{ request.get_id }}" class="modal">
                                 <div class="modal-content">
                                     <label> Example cURL request:
-                                        <textarea rows='75' cols='75'>{{ transition.get_curl_command(data.HOST)|raw }}</textarea>
+                                        <textarea rows='75' cols='75'>{{ transition.get_curl_command(data.HOST) }}</textarea>
                                     </label>
                                 </div>
                                 <div class="modal-footer">

tests/statics/drafter/apib/index.apib

@@ -19,6 +19,8 @@ You must provide the `Authorization: Bearer {access_token}` header in all other
 
 The current client ID and secret are [available here](http://pastebin.com/fX6ejAHd)
 
++ Request (application/json)
+
 + Attributes
     + grant_type: `password` (string) - The type of oAuth grant. Always "password"
     + client_id: `abc` (string) - The oAuth client ID

tests/statics/drafter/html/basic.html

@@ -286,9 +286,70 @@
                             "method": {
                               "element": "string",
                               "content": "POST"
+                            },
+                            "headers": {
+                              "element": "httpHeaders",
+                              "content": [
+                                {
+                                  "element": "member",
+                                  "content": {
+                                    "key": {
+                                      "element": "string",
+                                      "content": "Content-Type"
+                                    },
+                                    "value": {
+                                      "element": "string",
+                                      "content": "application/json"
+                                    }
+                                  }
+                                }
+                              ]
                             }
                           },
-                          "content": []
+                          "content": [
+                            {
+                              "element": "asset",
+                              "meta": {
+                                "classes": {
+                                  "element": "array",
+                                  "content": [
+                                    {
+                                      "element": "string",
+                                      "content": "messageBody"
+                                    }
+                                  ]
+                                }
+                              },
+                              "attributes": {
+                                "contentType": {
+                                  "element": "string",
+                                  "content": "application/json"
+                                }
+                              },
+                              "content": "{\n  \"grant_type\": \"password\",\n  \"client_id\": \"abc\",\n  \"client_secret\": \"123\",\n  \"email\": \"[email protected]\",\n  \"password\": \"edisonsux\"\n}"
+                            },
+                            {
+                              "element": "asset",
+                              "meta": {
+                                "classes": {
+                                  "element": "array",
+                                  "content": [
+                                    {
+                                      "element": "string",
+                                      "content": "messageBodySchema"
+                                    }
+                                  ]
+                                }
+                              },
+                              "attributes": {
+                                "contentType": {
+                                  "element": "string",
+                                  "content": "application/schema+json"
+                                }
+                              },
+                              "content": "{\n  \"$schema\": \"http://json-schema.org/draft-07/schema#\",\n  \"type\": \"object\",\n  \"properties\": {\n    \"grant_type\": {\n      \"type\": \"string\"\n    },\n    \"client_id\": {\n      \"type\": \"string\"\n    },\n    \"client_secret\": {\n      \"type\": \"string\"\n    },\n    \"email\": {\n      \"type\": \"string\"\n    },\n    \"password\": {\n      \"type\": \"string\"\n    }\n  }\n}"
+                            }
+                          ]
                         },
                         {
                           "element": "httpResponse",