[Merge] lp:~jjo/bash-completion/fix-bash43-quote_readline_by_ref-tilde-and-double_escaping into lp:ubuntu/bash-completion

[JuanJo Ciarlante]

Apologies for changing the new MP (instead of this one), found cleaner to re-start it from scratch.
Quilted the changes as debian/patches/, please review:
   https://code.launchpad.net/~jjo/bash-completion/quote_readline_by_ref_fixes/+merge/210930

Cheers,
--JuanJo

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https://code.launchpad.net/~jjo/bash-completion/fix-bash43-quote_readline_by_ref-tilde-and-double_escaping/+merge/210421
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