Questionable tip on replacing "$(dirname …)"

[jhermann]

This is questionable, since it ignores the very real cornercase of "$0" being a plain word ("dirname foo" is ".", not "foo").

scriptdir="$(cd "$(dirname "$0")" && pwd)"
                   ^-- Use parameter expansion instead, such as ${var%/*}.

[koalaman]

Since these warnings fail for cases like "/", "", and "foo", they've been removed in 3a9ae0e

[pihentagy]

See also issue #9