doc: fix usage of folder and directory terms in fs.md

doc/api/fs.md

@@ -2459,11 +2459,11 @@ changes:
 Asynchronously creates a directory.
 
 The callback is given a possible exception and, if `recursive` is `true`, the
-first folder path created, `(err, [path])`.
+first directory path created, `(err, [path])`.
 
 The optional `options` argument can be an integer specifying `mode` (permission
 and sticky bits), or an object with a `mode` property and a `recursive`
-property indicating whether parent folders should be created. Calling
+property indicating whether parent directories should be created. Calling
 `fs.mkdir()` when `path` is a directory that exists results in an error only
 when `recursive` is false.
 
@@ -2509,7 +2509,7 @@ changes:
 * Returns: {string|undefined}
 
 Synchronously creates a directory. Returns `undefined`, or if `recursive` is
-`true`, the first folder path created.
+`true`, the first directory path created.
 This is the synchronous version of [`fs.mkdir()`][].
 
 See also: mkdir(2).
@@ -2536,7 +2536,7 @@ changes:
   * `encoding` {string} **Default:** `'utf8'`
 * `callback` {Function}
   * `err` {Error}
-  * `folder` {string}
+  * `directory` {string}
 
 Creates a unique temporary directory.
 
@@ -2546,16 +2546,16 @@ inconsistencies, avoid trailing `X` characters in `prefix`. Some platforms,
 notably the BSDs, can return more than six random characters, and replace
 trailing `X` characters in `prefix` with random characters.
 
-The created folder path is passed as a string to the callback's second
+The created directory path is passed as a string to the callback's second
 parameter.
 
 The optional `options` argument can be a string specifying an encoding, or an
 object with an `encoding` property specifying the character encoding to use.
 
 ```js
-fs.mkdtemp(path.join(os.tmpdir(), 'foo-'), (err, folder) => {
+fs.mkdtemp(path.join(os.tmpdir(), 'foo-'), (err, directory) => {
   if (err) throw err;
-  console.log(folder);
+  console.log(directory);
   // Prints: /tmp/foo-itXde2 or C:\Users\...\AppData\Local\Temp\foo-itXde2
 });
 ```
@@ -2571,19 +2571,19 @@ must end with a trailing platform-specific path separator
 const tmpDir = os.tmpdir();
 
 // This method is *INCORRECT*:
-fs.mkdtemp(tmpDir, (err, folder) => {
+fs.mkdtemp(tmpDir, (err, directory) => {
   if (err) throw err;
-  console.log(folder);
+  console.log(directory);
   // Will print something similar to `/tmpabc123`.
   // A new temporary directory is created at the file system root
   // rather than *within* the /tmp directory.
 });
 
 // This method is *CORRECT*:
 const { sep } = require('path');
-fs.mkdtemp(`${tmpDir}${sep}`, (err, folder) => {
+fs.mkdtemp(`${tmpDir}${sep}`, (err, directory) => {
   if (err) throw err;
-  console.log(folder);
+  console.log(directory);
   // Will print something similar to `/tmp/abc123`.
   // A new temporary directory is created within
   // the /tmp directory.
@@ -2600,7 +2600,7 @@ added: v5.10.0
   * `encoding` {string} **Default:** `'utf8'`
 * Returns: {string}
 
-Returns the created folder path.
+Returns the created directory path.
 
 For detailed information, see the documentation of the asynchronous version of
 this API: [`fs.mkdtemp()`][].
@@ -3465,7 +3465,7 @@ error raised if the file is not available.
 To check if a file exists without manipulating it afterwards, [`fs.access()`][]
 is recommended.
 
-For example, given the following folder structure:
+For example, given the following directory structure:
 
 ```fundamental
 - txtDir
@@ -4972,11 +4972,11 @@ added: v10.0.0
 * Returns: {Promise}
 
 Asynchronously creates a directory then resolves the `Promise` with either no
-arguments, or the first folder path created if `recursive` is `true`.
+arguments, or the first directory path created if `recursive` is `true`.
 
 The optional `options` argument can be an integer specifying `mode` (permission
 and sticky bits), or an object with a `mode` property and a `recursive`
-property indicating whether parent folders should be created. Calling
+property indicating whether parent directories should be created. Calling
 `fsPromises.mkdir()` when `path` is a directory that exists results in a
 rejection only when `recursive` is false.
 
@@ -4991,7 +4991,7 @@ added: v10.0.0
 * Returns: {Promise}
 
 Creates a unique temporary directory and resolves the `Promise` with the created
-folder path. A unique directory name is generated by appending six random
+directory path. A unique directory name is generated by appending six random
 characters to the end of the provided `prefix`. Due to platform
 inconsistencies, avoid trailing `X` characters in `prefix`. Some platforms,
 notably the BSDs, can return more than six random characters, and replace