tests/test-diff-issue2761.t

httppeer: avoid large dumps when we don't see an hgweb repo

When we don't get an hgweb protocol response, we dump the response to
the user for diagnostic purposes (it might be a cgitb message, for
instance).

But if we try to clone a bundle, we don't want to show the
entire bundle in the error message. Also, we don't want fetch the
full bundle multiple times during fallback. So we only fetch 1k here.

Test issue2761

  $ hg init

  $ touch to-be-deleted
  $ hg add
  adding to-be-deleted
  $ hg ci -m first
  $ echo a > to-be-deleted
  $ hg ci -m second
  $ rm to-be-deleted
  $ hg diff -r 0

Same issue, different code path

  $ hg up -C
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ touch does-not-exist-in-1
  $ hg add
  adding does-not-exist-in-1
  $ hg ci -m third
  $ rm does-not-exist-in-1
  $ hg diff -r 1