markdownlint/doc-build/md014.md

This rule is triggered when there are code blocks showing shell commands to be typed, and all of the shell commands are preceded by dollar signs ($):

$ ls
$ cat foo
$ less bar

The dollar signs are unnecessary in this situation, and should not be included:

ls
cat foo
less bar

Showing output for commands preceded by dollar signs does not trigger this rule:

$ ls
foo bar
$ cat foo
Hello world
$ cat bar
baz

Because some commands do not produce output, it is not a violation if some commands do not have output:

$ mkdir test
mkdir: created directory 'test'
$ ls test

Rationale: It is easier to copy/paste and less noisy if the dollar signs are omitted when they are not needed. See https://cirosantilli.com/markdown-style-guide#dollar-signs-in-shell-code for more information.