It would much more useful in the output buffer of ‘C-h l’ (view-lossage)
to use the same format as is used by ‘edit-last-kbd-macro’.

Then it will possible to just copy the lines from the buffer generated
by ‘view-lossage’, yank them to the buffer “*Edit Macro*” created by
‘edit-last-kbd-macro’, and save the macro by ‘C-c C-c’.

This is useful for such cases when the user forgets to start macro recording,
or wants to convert recent keystrokes to the macro without re-typing them,
or pick only some of recent keystrokes and compose a new macro
in different order.

This patch is for master: