Unescaped $ used in a literal context SH-1000

If $ is not used specially, it is recommended to escape it.

Problematic code:

echo "$"

Correct code:

echo "\$"

Rationale: $is special in double quotes, but there are some cases where it's interpreted literally:

Following a backslash: echo "\$" In a context where the shell can't make sense of it, such as at the end of the string, ("foo$") or before some constructs ("$'foo'"). To avoid relying on strange and shell-specific behavior, any $ intended to be literal should be escaped with a backslash.