[MacPorts] #58217: bash-completion: add subport for bash 3.2 compatible version

[MacPorts]

#58217: bash-completion: add subport for bash 3.2 compatible version
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 Reporter:  mohd-akram   |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  bash-completion
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 It would be nice to have a subport which supports the default macOS bash.
 I prefer to use the default bash to make sure scripts work on other
 systems. Homebrew currently does this by having two separate formulae,
 bash-completion & bash-completion at 2. The last version compatible with bash
 3.2 is bash-completion 1.3.

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Ticket URL: <https://trac.macports.org/ticket/58217>
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