tests: allow Google's internal builds of clang-format to be used These builds do not actually include any Google-specific formatting changes; the only reason they don't include the LLVM version number is due to a decision to elide the version number from *all* LLVM/clang projects. For most builds of clang-format, even "unofficial" ones, the LLVM version will be displayed; example: ``` clang-format version 14.0.0 (https://github.com/llvm/llvm-project.git 1830ec94ac022ae0b6d6876fc2251e6b91e5931e) ``` The Google-internal build looks like this: ``` clang-format version google3-trunk (1830ec94ac022ae0b6d6876fc2251e6b91e5931e) ``` Differential Revision: https://phab.mercurial-scm.org/D10538

  $ . $TESTDIR/wireprotohelpers.sh

  $ hg init server
  $ enablehttpv2 server
  $ cd server
  $ cat >> .hg/hgrc << EOF
  > [web]
  > push_ssl = false
  > allow-push = *
  > EOF
  $ hg debugdrawdag << EOF
  > C D
  > |/
  > B
  > |
  > A
  > EOF
  $ root_node=$(hg log -r A -T '{node}')

  $ hg serve -p $HGPORT -d --pid-file hg.pid -E error.log
  $ cat hg.pid > $DAEMON_PIDS

lookup for known node works

  $ sendhttpv2peer << EOF
  > command lookup
  >     key $root_node
  > EOF
  creating http peer for wire protocol version 2
  sending lookup command
  response: b'Bk\xad\xa5\xc6u\x98\xcae\x03mW\xd9\xe4\xb6K\x0c\x1c\xe7\xa0'

  $ cat error.log