SC2006

Use $(..) instead of deprecated `..`

Problematic code:

echo "Current time: `date`"

Correct code:

echo "Current time: $(date)"

Rationale:

Backtick command substitution `..` is legacy syntax with several problems.

1. It has a series of undefined behaviors related to quoting in POSIX.
2. It imposes a custom escaping mode with surprising results.
3. It's exceptionally hard to nest.

$(..) command substitution has none of these problems, and is therefore strongly encouraged.

Contraindications

None.