#3 checkbashisms: does not report dollarbrace extended syntax

[Mark Hobley]

The use of dollarbrace constructs is actually an extended syntax provided by the korn shell:

# This is actually a bashism
foo=$(ls)

# Use backticks instead
foo=`ls`

[Mike Frysinger]

those are parenthesis, not braces. even then, this is perfectly valid POSIX code.

http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_06_03