Generalize the type of the `doc` argument of `reconcile_insert` #121

Job	Run time
clippy	31s
cargo-deny (advisories)	18s
linux (1.78.0)	58s
cargo-deny (bans licenses sources)	14s
fmt	14s
linux (nightly)	49s
macos	47s
windows	1m 59s
	5m 50s

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