Support fixing JSON files with fixjson

doc/ale-json.txt

@@ -2,6 +2,45 @@
 ALE JSON Integration                                         *ale-json-options*
 
 
+===============================================================================
+fixjson                                                      *ale-json-fixjson*
+
+fixjson is a JSON file fixer/formatter for humans using (relaxed) JSON5.
+It provides:
+
+- Pretty-prints JSON input
+- Fixes various failures while humans writing JSON
+  - Fixes trailing commas objects or arrays
+  - Fixes missing commas for elements of objects or arrays
+  - Adds quotes to keys in objects
+  - Newlines in strings
+  - Hex numbers
+  - Fixes single quotes to double quotes
+
+You can install it using npm:
+>
+  $ npm install -g fixjson
+<
+ALE provides fixjson integration as a fixer. See |ale-fix|.
+
+g:ale_json_fixjson_executable                   *g:ale_json_fixjson_executable*
+                                                *b:ale_json_fixjson_executable*
+
+  Type: |String|
+  Default: `'fixjson'`
+
+  The executable that will be run for fixjson.
+
+g:ale_json_fixjson_options                         *g:ale_json_fixjson_options*
+                                                   *b:ale_json_fixjson_options*
+
+  Type: |String|
+  Default: `''`
+
+  This variable can add extra options to the command executed for running
+  fixjson.
+
+
 ===============================================================================
 jsonlint                                                    *ale-json-jsonlint*
 

doc/ale.txt

@@ -112,6 +112,7 @@ CONTENTS                                                         *ale-contents*
       standard............................|ale-javascript-standard|
       xo..................................|ale-javascript-xo|
     json..................................|ale-json-options|
+      fixjson.............................|ale-json-fixjson|
       jsonlint............................|ale-json-jsonlint|
       jq..................................|ale-json-jq|
       prettier............................|ale-json-prettier|
@@ -322,7 +323,7 @@ Notes:
 * Idris: `idris`
 * Java: `checkstyle`, `javac`, `google-java-format`
 * JavaScript: `eslint`, `flow`, `jscs`, `jshint`, `prettier`, `prettier-eslint`, `prettier-standard`, `standard`, `xo`
-* JSON: `jsonlint`, `jq`, `prettier`
+* JSON: `fixjson`, `jsonlint`, `jq`, `prettier`
 * Kotlin: `kotlinc`, `ktlint`
 * LaTeX (tex): `alex`!!, `chktex`, `lacheck`, `proselint`, `redpen`, `vale`, `write-good`
 * Less: `lessc`, `prettier`, `stylelint`