Revert "Merge branch 'renovate-gems/development-gems' into 'master'"

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From @cwoolley-gitlab

lefthook -v run pre-push gives output like this:
error replacing {files}: exit status 128
yamllint: (skip) error
[lefthook] err: exit status 128
[lefthook] out: fatal: ambiguous argument '$(git': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'

[lefthook] err: exit status 128
[lefthook] out: fatal: ambiguous argument '$(git': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
Like it doesn’t know about the bash subshell syntax $(...)…

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