Cryptographic signature support in templates was added in
c99c97c646 (#4853), but has to be manually
configured. This adds some defaults to the built-in config.
Instead of having separate `builtin_*_with_sig` aliases, this adds to
the aliases that actually format commits. Since signature verification
is slow, this is disabled by default. To enable it, override
`ui.show-cryptographic-signatures`:
[ui]
show-cryptographic-signatures = true
[template-aliases]
'format_short_cryptographic_signature(signature)' = ...
'format_detailed_cryptographic_signature(signature)' = ...
Note that the two formatting functions take
`Option<CryptographicSignature>`, not `CryptographicSignature`. This
allows you to display a custom message if a signature is not found, but
will emit an error if you do not check for signature presence.
[template-aliases]
'format_detailed_cryptographic_signature(signature)' = '''
if(signature,
"message if present",
"message if missing",
)
'''
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