Description:
bzgrep(1) is #!/bin/sh but it has a parameter expansion bashisms

Additional info:
* package version(s): bzip2 1.0.5-5

$ checkbashisms -f /usr/bin/bzgrep
possible bashism in /usr/bin/bzgrep line 66 (${parm/?/pat[/str]}):
j=${i//\\/\\\\}
possible bashism in /usr/bin/bzgrep line 67 (${parm/?/pat[/str]}):
j=${j//|/\\|}
possible bashism in /usr/bin/bzgrep line 68 (${parm/?/pat[/str]}):
j=${j//&/\\&}

$ dash -c 'foo=bar; echo ${foo//bar}'
dash: Bad substitution

Steps to reproduce:
Use a shell that's not bash(1) as /bin/sh