doc: correct markdown file line lengths

This commit updates two paragraphs that exceeded the 80 line standard
after updating to macOS.

PR-URL: https://github.com/nodejs/node/pull/12106
Fixes: https://github.com/nodejs/node/issues/12086
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

doc/api/fs.md

@@ -1374,9 +1374,9 @@ The kernel ignores the position argument and always appends the data to
 the end of the file.
 
 _Note: The behavior of `fs.open()` is platform specific for some flags. As such,
-opening a directory on macOS and Linux with the `'a+'` flag - see example below -
+opening a directory on macOS and Linux with the `'a+'` flag - see example
-will return an error. In contrast, on Windows and FreeBSD, a file descriptor
+below - will return an error. In contrast, on Windows and FreeBSD, a file
-will be returned._
+descriptor will be returned._
 
 ```js
 // macOS and Linux

doc/api/process.md

@@ -1631,12 +1631,12 @@ the current value of `ps`.
 
 *Note*: When a new value is assigned, different platforms will impose different
 maximum length restrictions on the title. Usually such restrictions are quite
-limited. For instance, on Linux and macOS, `process.title` is limited to the size
+limited. For instance, on Linux and macOS, `process.title` is limited to the
-of the binary name plus the length of the command line arguments because setting
+size of the binary name plus the length of the command line arguments because
-the `process.title` overwrites the `argv` memory of the process. Node.js v0.8
+setting the `process.title` overwrites the `argv` memory of the process.
-allowed for longer process title strings by also overwriting the `environ`
+Node.js v0.8 allowed for longer process title strings by also overwriting the
-memory but that was potentially insecure and confusing in some (rather obscure)
+`environ` memory but that was potentially insecure and confusing in some
-cases.
+(rather obscure) cases.
 
 ## process.umask([mask])
 <!-- YAML