[ih] Fwd: Reporter query on the history of greater-than in quoted replies

[Tony Finch]

I had a dig through the history of the BSD mail command to see if/when
message quoting turned up.

It seems to arrive in 1988, with a default indent of \t
https://github.com/dspinellis/unix-history-repo/commit/b67d96f80401cad5410d9a4cc947a14b9f4b9b12#diff-df5903b671fa9aa2e169be159339a0fa

There's documentation in this commit which suggests setting tabstr to '-> '
https://github.com/dspinellis/unix-history-repo/commit/7eec6b26cca8e69dc514d64c65385b27caec38be#diff-df5903b671fa9aa2e169be159339a0fa

In 1989 the tabstr setting was renamed to indentprefix
https://github.com/dspinellis/unix-history-repo/commit/1bc3363419be5e5ded196102481584a2931612eb#diff-df5903b671fa9aa2e169be159339a0fa
https://github.com/dspinellis/unix-history-repo/commit/3db0dac41be0491eec6c8c5b7d3d93fb99abea47#diff-df5903b671fa9aa2e169be159339a0fa

Tony.
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