The output of this command is confusing. It is not clear which of the
hashes printed is that of the revision and which one is the respective
head commit.
Further, the hash is omitted on the initial revision, adding confusion.
Further, the terminology of "revised" vs. "updated" is confusing.
This rewrites `timeline.rs` to drop the distinction between various
revisions (in wording, the small icon is still different) and cleans up
the output.
Attention is paid to alignment of the output. Now all verbs of updates
("accepted", "rejected", "reviewed", "merged") are aligned, and authors
("… by …") are also aligned.
The rewrite itself is not for better code quality or readability.
Note that all the code in this file only accessed via one `fn` by one
callsite in the implementation of `rad patch`.
f9ff484c9e