>> 2008-10-11  Romain Francoise  <romain@orebokech.com>
  >>
  >> 	* kmacro.el (kmacro-edit-lossage): Fix docstring, lossage is now 300 keys.
  >
  > Yes, that's what I want.  I hope you won't find this too hard to
  > implement, what with all the possible variations of this ``style'' of
  > log entries.

I attached an improved version of this.  When in a Log-View mode buffer,
type `c' to shadow/hide all (well, most) entries not related to the
current file.  Type `o' when on an object in a parenthesized list, to
only show entries for that object.  Type `y' to remove any shadowing or
hiding.  Use `log-view-shadow' to toggle shadowing (it's currently by
default on for the `c' command to find errors sooner).

Suggestions welcome, martin.