doc: update fs.md to new default values style

Refs: nodejs#13769

New style is introduced in PR nodejs#13769.

doc/api/fs.md

@@ -436,7 +436,7 @@ changes:
 -->
 
 * `path` {string|Buffer|URL}
-* `mode` {integer} default = `fs.constants.F_OK`
+* `mode` {integer} **Default:** `fs.constants.F_OK`
 * `callback` {Function}
 
 Tests a user's permissions for the file or directory specified by `path`.
@@ -562,7 +562,7 @@ changes:
 -->
 
 * `path` {string|Buffer|URL}
-* `mode` {integer} default = `fs.constants.F_OK`
+* `mode` {integer} **Default:** `fs.constants.F_OK`
 
 Synchronous version of [`fs.access()`][]. This throws if any accessibility
 checks fail, and does nothing otherwise.
@@ -586,9 +586,9 @@ changes:
 * `file` {string|Buffer|number} filename or file descriptor
 * `data` {string|Buffer}
 * `options` {Object|string}
-  * `encoding` {string|null} default = `'utf8'`
-  * `mode` {integer} default = `0o666`
-  * `flag` {string} default = `'a'`
+  * `encoding` {string|null} **Default:** `'utf8'`
+  * `mode` {integer} **Default:** `0o666`
+  * `flag` {string} **Default:** `'a'`
 * `callback` {Function}
 
 Asynchronously append data to a file, creating the file if it does not yet exist.
@@ -629,9 +629,9 @@ changes:
 * `file` {string|Buffer|number} filename or file descriptor
 * `data` {string|Buffer}
 * `options` {Object|string}
-  * `encoding` {string|null} default = `'utf8'`
-  * `mode` {integer} default = `0o666`
-  * `flag` {string} default = `'a'`
+  * `encoding` {string|null} **Default:** `'utf8'`
+  * `mode` {integer} **Default:** `0o666`
+  * `flag` {string} **Default:** `'a'`
 
 The synchronous version of [`fs.appendFile()`][]. Returns `undefined`.
 
@@ -1146,7 +1146,7 @@ changes:
 -->
 
 * `fd` {integer}
-* `len` {integer} default = `0`
+* `len` {integer} **Default:** `0`
 * `callback` {Function}
 
 Asynchronous ftruncate(2). No arguments other than a possible exception are
@@ -1199,7 +1199,7 @@ added: v0.8.6
 -->
 
 * `fd` {integer}
-* `len` {integer} default = `0`
+* `len` {integer} **Default:** `0`
 
 Synchronous ftruncate(2). Returns `undefined`.
 
@@ -1388,7 +1388,7 @@ changes:
 -->
 
 * `path` {string|Buffer|URL}
-* `mode` {integer} default = `0o777`
+* `mode` {integer} **Default:** `0o777`
 * `callback` {Function}
 
 Asynchronous mkdir(2). No arguments other than a possible exception are given
@@ -1405,7 +1405,7 @@ changes:
 -->
 
 * `path` {string|Buffer|URL}
-* `mode` {integer} default = `0o777`
+* `mode` {integer} **Default:** `0o777`
 
 Synchronous mkdir(2). Returns `undefined`.
 
@@ -1424,7 +1424,7 @@ changes:
 
 * `prefix` {string}
 * `options` {string|Object}
-  * `encoding` {string} default = `'utf8'`
+  * `encoding` {string} **Default:** `'utf8'`
 * `callback` {Function}
 
 Creates a unique temporary directory.
@@ -1486,7 +1486,7 @@ added: v5.10.0
 
 * `prefix` {string}
 * `options` {string|Object}
-  * `encoding` {string} default = `'utf8'`
+  * `encoding` {string} **Default:** `'utf8'`
 
 The synchronous version of [`fs.mkdtemp()`][]. Returns the created
 folder path.
@@ -1506,7 +1506,7 @@ changes:
 
 * `path` {string|Buffer|URL}
 * `flags` {string|number}
-* `mode` {integer} default = `0o666`
+* `mode` {integer} **Default:** `0o666`
 * `callback` {Function}
 
 Asynchronous file open. See open(2). `flags` can be:
@@ -1595,7 +1595,7 @@ changes:
 
 * `path` {string|Buffer|URL}
 * `flags` {string|number}
-* `mode` {integer} default = `0o666`
+* `mode` {integer} **Default:** `0o666`
 
 Synchronous version of [`fs.open()`][]. Returns an integer representing the file
 descriptor.
@@ -1654,7 +1654,7 @@ changes:
 
 * `path` {string|Buffer|URL}
 * `options` {string|Object}
-  * `encoding` {string} default = `'utf8'`
+  * `encoding` {string} **Default:** `'utf8'`
 * `callback` {Function}
 
 Asynchronous readdir(3).  Reads the contents of a directory.
@@ -1678,7 +1678,7 @@ changes:
 
 * `path` {string|Buffer|URL}
 * `options` {string|Object}
-  * `encoding` {string} default = `'utf8'`
+  * `encoding` {string} **Default:** `'utf8'`
 
 Synchronous readdir(3). Returns an array of filenames excluding `'.'` and
 `'..'`.
@@ -1711,8 +1711,8 @@ changes:
 
 * `path` {string|Buffer|URL|integer} filename or file descriptor
 * `options` {Object|string}
-  * `encoding` {string|null} default = `null`
-  * `flag` {string} default = `'r'`
+  * `encoding` {string|null} **Default:** `null`
+  * `flag` {string} **Default:** `'r'`
 * `callback` {Function}
 
 Asynchronously reads the entire contents of a file. Example:
@@ -1771,8 +1771,8 @@ changes:
 
 * `path` {string|Buffer|URL|integer} filename or file descriptor
 * `options` {Object|string}
-  * `encoding` {string|null} default = `null`
-  * `flag` {string} default = `'r'`
+  * `encoding` {string|null} **Default:** `null`
+  * `flag` {string} **Default:** `'r'`
 
 Synchronous version of [`fs.readFile()`][]. Returns the contents of the `path`.
 
@@ -1807,7 +1807,7 @@ changes:
 
 * `path` {string|Buffer|URL}
 * `options` {string|Object}
-  * `encoding` {string} default = `'utf8'`
+  * `encoding` {string} **Default:** `'utf8'`
 * `callback` {Function}
 
 Asynchronous readlink(2). The callback gets two arguments `(err,
@@ -1830,7 +1830,7 @@ changes:
 
 * `path` {string|Buffer|URL}
 * `options` {string|Object}
-  * `encoding` {string} default = `'utf8'`
+  * `encoding` {string} **Default:** `'utf8'`
 
 Synchronous readlink(2). Returns the symbolic link's string value.
 
@@ -1882,7 +1882,7 @@ changes:
 
 * `path` {string|Buffer|URL}
 * `options` {string|Object}
-  * `encoding` {string} default = `'utf8'`
+  * `encoding` {string} **Default:** `'utf8'`
 * `callback` {Function}
 
 Asynchronous realpath(3). The `callback` gets two arguments `(err,
@@ -1920,7 +1920,7 @@ changes:
 
 * `path` {string|Buffer|URL}
 * `options` {string|Object}
-  * `encoding` {string} default = `'utf8'`
+  * `encoding` {string} **Default:** `'utf8'`
 
 Synchronous realpath(3). Returns the resolved path.
 
@@ -2063,7 +2063,7 @@ changes:
 
 * `target` {string|Buffer|URL}
 * `path` {string|Buffer|URL}
-* `type` {string} default = `'file'`
+* `type` {string} **Default:** `'file'`
 * `callback` {Function}
 
 Asynchronous symlink(2). No arguments other than a possible exception are given
@@ -2094,7 +2094,7 @@ changes:
 
 * `target` {string|Buffer|URL}
 * `path` {string|Buffer|URL}
-* `type` {string} default = `'file'`
+* `type` {string} **Default:** `'file'`
 
 Synchronous symlink(2). Returns `undefined`.
 
@@ -2109,7 +2109,7 @@ changes:
 -->
 
 * `path` {string|Buffer}
-* `len` {integer} default = `0`
+* `len` {integer} **Default:** `0`
 * `callback` {Function}
 
 Asynchronous truncate(2). No arguments other than a possible exception are
@@ -2122,7 +2122,7 @@ added: v0.8.6
 -->
 
 * `path` {string|Buffer}
-* `len` {integer} default = `0`
+* `len` {integer} **Default:** `0`
 
 Synchronous truncate(2). Returns `undefined`. A file descriptor can also be
 passed as the first argument. In this case, `fs.ftruncateSync()` is called.
@@ -2167,7 +2167,7 @@ added: v0.1.31
 -->
 
 * `filename` {string|Buffer}
-* `listener` {Function|undefined} default = `undefined`
+* `listener` {Function|undefined} **Default:** `undefined`
 
 Stop watching for changes on `filename`. If `listener` is specified, only that
 particular listener is removed. Otherwise, *all* listeners are removed,
@@ -2250,14 +2250,14 @@ changes:
 * `filename` {string|Buffer|URL}
 * `options` {string|Object}
   * `persistent` {boolean} Indicates whether the process should continue to run
-    as long as files are being watched. default = `true`
+    as long as files are being watched. **Default:** `true`
   * `recursive` {boolean} Indicates whether all subdirectories should be
     watched, or only the current directory. This applies when a directory is
-    specified, and only on supported platforms (See [Caveats][]). default =
+    specified, and only on supported platforms (See [Caveats][]). **Default:**
     `false`
   * `encoding` {string} Specifies the character encoding to be used for the
-     filename passed to the listener. default = `'utf8'`
-* `listener` {Function|undefined} default = `undefined`
+     filename passed to the listener. **Default:** `'utf8'`
+* `listener` {Function|undefined} **Default:** `undefined`
 
 Watch for changes on `filename`, where `filename` is either a file or a
 directory.  The returned object is a [`fs.FSWatcher`][].
@@ -2357,8 +2357,8 @@ changes:
 
 * `filename` {string|Buffer|URL}
 * `options` {Object}
-  * `persistent` {boolean} default = `true`
-  * `interval` {integer} default = `5007`
+  * `persistent` {boolean} **Default:** `true`
+  * `interval` {integer} **Default:** `5007`
 * `listener` {Function}
 
 Watch for changes on `filename`. The callback `listener` will be called each
@@ -2506,9 +2506,9 @@ changes:
 * `file` {string|Buffer|integer} filename or file descriptor
 * `data` {string|Buffer|Uint8Array}
 * `options` {Object|string}
-  * `encoding` {string|null} default = `'utf8'`
-  * `mode` {integer} default = `0o666`
-  * `flag` {string} default = `'w'`
+  * `encoding` {string|null} **Default:** `'utf8'`
+  * `mode` {integer} **Default:** `0o666`
+  * `flag` {string} **Default:** `'w'`
 * `callback` {Function}
 
 Asynchronously writes data to a file, replacing the file if it already exists.
@@ -2556,9 +2556,9 @@ changes:
 * `file` {string|Buffer|integer} filename or file descriptor
 * `data` {string|Buffer|Uint8Array}
 * `options` {Object|string}
-  * `encoding` {string|null} default = `'utf8'`
-  * `mode` {integer} default = `0o666`
-  * `flag` {string} default = `'w'`
+  * `encoding` {string|null} **Default:** `'utf8'`
+  * `mode` {integer} **Default:** `0o666`
+  * `flag` {string} **Default:** `'w'`
 
 The synchronous version of [`fs.writeFile()`][]. Returns `undefined`.