doc: fix various nits

* Replace 2 hyphens (--) by spaced m-dashes (—) as per STYLE_GUIDE.md.
* Space infix operators.
* Unify quotes in inline code spans (use only single quotes).
* Unify `* Returns:` (eliminate deviations).
* Dedupe spaces.

PR-URL: #19743
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

doc/api/addons.md

@@ -102,7 +102,7 @@ Addon module name is `addon`.
 Once the source code has been written, it must be compiled into the binary
 `addon.node` file. To do so, create a file called `binding.gyp` in the
 top-level of the project describing the build configuration of the module
-using a JSON-like format. This file is used by [node-gyp][] -- a tool written
+using a JSON-like format. This file is used by [node-gyp][] — a tool written
 specifically to compile Node.js Addons.
 
 ```json

doc/api/async_hooks.md

@@ -634,7 +634,7 @@ asyncResource.emitAfter();
 * `type` {string} The type of async event.
 * `options` {Object}
   * `triggerAsyncId` {number} The ID of the execution context that created this
-  async event.  **Default:** `executionAsyncId()`.
+  async event. **Default:** `executionAsyncId()`.
   * `requireManualDestroy` {boolean} Disables automatic `emitDestroy` when the
   object is garbage collected. This usually does not need to be set (even if
   `emitDestroy` is called manually), unless the resource's asyncId is retrieved

doc/api/buffer.md

@@ -59,7 +59,7 @@ differently based on what arguments are provided:
   entire `Buffer`. While this behavior is *intentional* to improve performance,
   development experience has demonstrated that a more explicit distinction is
   required between creating a fast-but-uninitialized `Buffer` versus creating a
-  slower-but-safer `Buffer`. Starting in Node.js 8.0.0,  `Buffer(num)` and
+  slower-but-safer `Buffer`. Starting in Node.js 8.0.0, `Buffer(num)` and
   `new Buffer(num)` will return a `Buffer` with initialized memory.
 * Passing a string, array, or `Buffer` as the first argument copies the
   passed object's data into the `Buffer`.
@@ -426,7 +426,7 @@ changes:
 
 * `size` {integer} The desired length of the new `Buffer`.
 
-Allocates a new `Buffer` of `size` bytes.  If the `size` is larger than
+Allocates a new `Buffer` of `size` bytes. If the `size` is larger than
 [`buffer.constants.MAX_LENGTH`] or smaller than 0, a [`RangeError`] will be
 thrown. A zero-length `Buffer` will be created if `size` is 0.
 
@@ -510,7 +510,7 @@ console.log(buf);
 // Prints: <Buffer 00 00 00 00 00>
 ```
 
-Allocates a new `Buffer` of `size` bytes.  If the `size` is larger than
+Allocates a new `Buffer` of `size` bytes. If the `size` is larger than
 [`buffer.constants.MAX_LENGTH`] or smaller than 0, a [`RangeError`] will be
 thrown. A zero-length `Buffer` will be created if `size` is 0.
 
@@ -551,7 +551,7 @@ changes:
 
 * `size` {integer} The desired length of the new `Buffer`.
 
-Allocates a new `Buffer` of `size` bytes.  If the `size` is larger than
+Allocates a new `Buffer` of `size` bytes. If the `size` is larger than
 [`buffer.constants.MAX_LENGTH`] or smaller than 0, a [`RangeError`] will be
 thrown. A zero-length `Buffer` will be created if `size` is 0.
 
@@ -595,7 +595,7 @@ added: v5.12.0
 
 * `size` {integer} The desired length of the new `Buffer`.
 
-Allocates a new `Buffer` of `size` bytes.  If the `size` is larger than
+Allocates a new `Buffer` of `size` bytes. If the `size` is larger than
 [`buffer.constants.MAX_LENGTH`] or smaller than 0, a [`RangeError`] will be
 thrown. A zero-length `Buffer` will be created if `size` is 0.
 
@@ -2498,7 +2498,7 @@ deprecated: v6.0.0
 
 * `size` {integer} The desired length of the new `SlowBuffer`.
 
-Allocates a new `Buffer` of `size` bytes.  If the `size` is larger than
+Allocates a new `Buffer` of `size` bytes. If the `size` is larger than
 [`buffer.constants.MAX_LENGTH`] or smaller than 0, a [`RangeError`] will be
 thrown. A zero-length `Buffer` will be created if `size` is 0.
 

doc/api/child_process.md

@@ -41,7 +41,7 @@ the event loop until the spawned process either exits or is terminated.
 
 For convenience, the `child_process` module provides a handful of synchronous
 and asynchronous alternatives to [`child_process.spawn()`][] and
-[`child_process.spawnSync()`][].  *Note that each of these alternatives are
+[`child_process.spawnSync()`][]. *Note that each of these alternatives are
 implemented on top of [`child_process.spawn()`][] or [`child_process.spawnSync()`][].*
 
   * [`child_process.exec()`][]: spawns a shell and runs a command within that shell,
@@ -148,7 +148,7 @@ changes:
   * `timeout` {number} **Default:** `0`
   * `maxBuffer` {number} Largest amount of data in bytes allowed on stdout or
     stderr. If exceeded, the child process is terminated. See caveat at
-    [`maxBuffer` and Unicode][]. **Default:** `200*1024`.
+    [`maxBuffer` and Unicode][]. **Default:** `200 * 1024`.
   * `killSignal` {string|integer} **Default:** `'SIGTERM'`
   * `uid` {number} Sets the user identity of the process (see setuid(2)).
   * `gid` {number} Sets the group identity of the process (see setgid(2)).
@@ -190,7 +190,7 @@ exec('cat *.js bad_file | wc -l', (error, stdout, stderr) => {
 ```
 
 If a `callback` function is provided, it is called with the arguments
-`(error, stdout, stderr)`. On success, `error` will be `null`.  On error,
+`(error, stdout, stderr)`. On success, `error` will be `null`. On error,
 `error` will be an instance of [`Error`][]. The `error.code` property will be
 the exit code of the child process while `error.signal` will be set to the
 signal that terminated the process. Any exit code other than `0` is considered
@@ -246,7 +246,7 @@ changes:
   * `timeout` {number} **Default:** `0`
   * `maxBuffer` {number} Largest amount of data in bytes allowed on stdout or
     stderr. If exceeded, the child process is terminated. See caveat at
-    [`maxBuffer` and Unicode][]. **Default:** `200*1024`.
+    [`maxBuffer` and Unicode][]. **Default:** `200 * 1024`.
   * `killSignal` {string|integer} **Default:** `'SIGTERM'`
   * `uid` {number} Sets the user identity of the process (see setuid(2)).
   * `gid` {number} Sets the group identity of the process (see setgid(2)).
@@ -527,7 +527,7 @@ disabled*.
 On non-Windows platforms, if `options.detached` is set to `true`, the child
 process will be made the leader of a new process group and session. Note that
 child processes may continue running after the parent exits regardless of
-whether they are detached or not.  See setsid(2) for more information.
+whether they are detached or not. See setsid(2) for more information.
 
 By default, the parent will wait for the detached child to exit. To prevent
 the parent from waiting for a given `subprocess`, use the `subprocess.unref()`
@@ -701,7 +701,7 @@ changes:
     process will be killed. **Default:** `'SIGTERM'`.
   * `maxBuffer` {number} Largest amount of data in bytes allowed on stdout or
     stderr. If exceeded, the child process is terminated. See caveat at
-    [`maxBuffer` and Unicode][]. **Default:** `200*1024`.
+    [`maxBuffer` and Unicode][]. **Default:** `200 * 1024`.
   * `encoding` {string} The encoding used for all stdio inputs and outputs.
     **Default:** `'buffer'`.
   * `windowsHide` {boolean} Hide the subprocess console window that would
@@ -762,7 +762,7 @@ changes:
     process will be killed. **Default:** `'SIGTERM'`.
   * `maxBuffer` {number} Largest amount of data in bytes allowed on stdout or
     stderr. If exceeded, the child process is terminated. See caveat at
-    [`maxBuffer` and Unicode][]. **Default:** `200*1024`.
+    [`maxBuffer` and Unicode][]. **Default:** `200 * 1024`.
   * `encoding` {string} The encoding used for all stdio inputs and outputs.
     **Default:** `'buffer'`.
   * `windowsHide` {boolean} Hide the subprocess console window that would
@@ -773,12 +773,12 @@ The `child_process.execSync()` method is generally identical to
 [`child_process.exec()`][] with the exception that the method will not return until
 the child process has fully closed. When a timeout has been encountered and
 `killSignal` is sent, the method won't return until the process has completely
-exited. *Note that if  the child process intercepts and handles the `SIGTERM`
+exited. *Note that if the child process intercepts and handles the `SIGTERM`
 signal and doesn't exit, the parent process will wait until the child
 process has exited.*
 
 If the process times out or has a non-zero exit code, this method ***will***
-throw.  The [`Error`][] object will contain the entire result from
+throw. The [`Error`][] object will contain the entire result from
 [`child_process.spawnSync()`][]
 
 **Never pass unsanitized user input to this function. Any input containing shell
@@ -818,7 +818,7 @@ changes:
     process will be killed. **Default:** `'SIGTERM'`.
   * `maxBuffer` {number} Largest amount of data in bytes allowed on stdout or
     stderr. If exceeded, the child process is terminated. See caveat at
-    [`maxBuffer` and Unicode][]. **Default:** `200*1024`.
+    [`maxBuffer` and Unicode][]. **Default:** `200 * 1024`.
   * `encoding` {string} The encoding used for all stdio inputs and outputs.
     **Default:** `'buffer'`.
   * `shell` {boolean|string} If `true`, runs `command` inside of a shell. Uses
@@ -1152,7 +1152,7 @@ registered on the [`process.on('message')`][] event. Any data that is received
 and buffered in the socket will not be sent to the child.
 
 The optional `callback` is a function that is invoked after the message is
-sent but before the child may have received it.  The function is called with a
+sent but before the child may have received it. The function is called with a
 single argument: `null` on success, or an [`Error`][] object on failure.
 
 If no `callback` function is provided and the message cannot be sent, an

doc/api/cli.md

@@ -517,7 +517,7 @@ added: v3.0.0
 
 Path to the file used to store the persistent REPL history. The default path is
 `~/.node_repl_history`, which is overridden by this variable. Setting the value
-to an empty string (`""` or `" "`) disables persistent REPL history.
+to an empty string (`''` or `' '`) disables persistent REPL history.
 
 
 ### `NODE_EXTRA_CA_CERTS=file`
@@ -602,7 +602,7 @@ reason any of these APIs takes a long time, other (seemingly unrelated) APIs
 that run in libuv's threadpool will experience degraded performance. In order to
 mitigate this issue, one potential solution is to increase the size of libuv's
 threadpool by setting the `'UV_THREADPOOL_SIZE'` environment variable to a value
-greater than `4` (its current default value).  For more information, see the
+greater than `4` (its current default value). For more information, see the
 [libuv threadpool documentation][].
 
 [`--openssl-config`]: #cli_openssl_config_file

doc/api/cluster.md

@@ -93,7 +93,7 @@ Node.js process and a cluster worker differs:
    process.
 3. `server.listen(0)` Normally, this will cause servers to listen on a
    random port.  However, in a cluster, each worker will receive the
-   same "random" port each time they do `listen(0)`.  In essence, the
+   same "random" port each time they do `listen(0)`. In essence, the
    port is random the first time, but predictable thereafter. To listen
    on a unique port, generate a port number based on the cluster worker ID.
 
@@ -103,8 +103,8 @@ things like sessions and login.
 
 Because workers are all separate processes, they can be killed or
 re-spawned depending on a program's needs, without affecting other
-workers.  As long as there are some workers still alive, the server will
-continue to accept connections.  If no workers are alive, existing connections
+workers. As long as there are some workers still alive, the server will
+continue to accept connections. If no workers are alive, existing connections
 will be dropped and new connections will be refused. Node.js does not
 automatically manage the number of workers, however. It is the application's
 responsibility to manage the worker pool based on its own needs.
@@ -465,7 +465,7 @@ Emitted after the worker IPC channel has disconnected. This can occur when a
 worker exits gracefully, is killed, or is disconnected manually (such as with
 worker.disconnect()).
 
-There may be a delay between the `'disconnect'` and `'exit'` events.  These
+There may be a delay between the `'disconnect'` and `'exit'` events. These
 events can be used to detect if the process is stuck in a cleanup or if there
 are long-living connections.
 
@@ -556,7 +556,7 @@ The `addressType` is one of:
 * `4` (TCPv4)
 * `6` (TCPv6)
 * `-1` (unix domain socket)
-* `"udp4"` or `"udp6"` (UDP v4 or v6)
+* `'udp4'` or `'udp6'` (UDP v4 or v6)
 
 ## Event: 'message'
 <!-- YAML
@@ -692,7 +692,7 @@ distribute IOCP handles without incurring a large performance hit.
 
 `cluster.schedulingPolicy` can also be set through the
 `NODE_CLUSTER_SCHED_POLICY` environment variable. Valid
-values are `"rr"` and `"none"`.
+values are `'rr'` and `'none'`.
 
 ## cluster.settings
 <!-- YAML

doc/api/console.md

@@ -12,7 +12,7 @@ The module exports two specific components:
 * A `Console` class with methods such as `console.log()`, `console.error()` and
   `console.warn()` that can be used to write to any Node.js stream.
 * A global `console` instance configured to write to [`process.stdout`][] and
-  [`process.stderr`][].  The global `console` can be used without calling
+  [`process.stderr`][]. The global `console` can be used without calling
   `require('console')`.
 
 ***Warning***: The global console object's methods are neither consistently

doc/api/crypto.md

@@ -301,7 +301,7 @@ Updates the cipher with `data`. If the `inputEncoding` argument is given,
 its value must be one of `'utf8'`, `'ascii'`, or `'latin1'` and the `data`
 argument is a string using the specified encoding. If the `inputEncoding`
 argument is not given, `data` must be a [`Buffer`][], `TypedArray`, or
-`DataView`.  If `data` is a [`Buffer`][], `TypedArray`, or `DataView`, then
+`DataView`. If `data` is a [`Buffer`][], `TypedArray`, or `DataView`, then
 `inputEncoding` is ignored.
 
 The `outputEncoding` specifies the output format of the enciphered
@@ -552,7 +552,7 @@ added: v0.5.0
 - `encoding` {string}
 
 Returns the Diffie-Hellman generator in the specified `encoding`, which can
-be `'latin1'`, `'hex'`, or `'base64'`. If  `encoding` is provided a string is
+be `'latin1'`, `'hex'`, or `'base64'`. If `encoding` is provided a string is
 returned; otherwise a [`Buffer`][] is returned.
 
 ### diffieHellman.getPrime([encoding])
@@ -1798,7 +1798,7 @@ console.log(key.toString('hex'));  // '3745e48...08d59ae'
 ```
 
 The `crypto.DEFAULT_ENCODING` property may be used to change the way the
-`derivedKey` is returned.  This property, however, has been deprecated and use
+`derivedKey` is returned. This property, however, has been deprecated and use
 should be avoided.
 
 ```js

doc/api/debugger.md

@@ -70,7 +70,7 @@ debug> repl
 Press Ctrl + C to leave debug repl
 > x
 5
-> 2+2
+> 2 + 2
 4
 debug> next
 < world

doc/api/deprecations.md

@@ -700,7 +700,7 @@ Type: Runtime
 
 `Module._debug()` has been deprecated.
 
-The `Module._debug()` function   was never documented as an officially
+The `Module._debug()` function was never documented as an officially
 supported API.
 
 <a id="DEP0078"></a>