Programmable completion for Bash 4.0+ Formula was removed
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Formula history

JCount bash-completion2: migrate to homebrew/core (#1539)
Chaoren Lin bash-completion2 2.4
Alexander Ronald Altman bash-completion2 2.3
Martin Afanasjew bash-completion2: add description, clean up
Carlos Liu bash-completion2: fix broken relative path symlink
Chris Kolenko Remove root_url if bintray
Jack Nagel bash-completion2: create brew symlink in post-install
Dominyk Tiller bash-completion2: use ssl/tls links
Chad Catlett bash-completion2: resolves issue with spaces in file/directory names
Jack Nagel bash-completion2: add debian patch to fix completion on an empty line
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