Fix an issue where Mercurial pushes would consider only the first and last commits

Summary:
Fixes T5197. `hg log --rev x --rev y` means "rev x, and also rev y".

Use `--rev x:y`, which means "all commits between x and y, inclusive".

Test Plan: Pushed 4 commits at once, got 4 commits in push log.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T5197

Differential Revision: https://secure.phabricator.com/D9309

src/applications/diffusion/engine/DiffusionCommitHookEngine.php

@@ -695,8 +695,8 @@ final class DiffusionCommitHookEngine extends Phobject {
     $futures['old']->updateEnv('HG_PENDING', null);
 
     $futures['commits'] = $repository->getLocalCommandFuture(
-      "log --rev %s --rev tip --template %s",
-      hgsprintf('%s', $hg_node),
+      'log --rev %s --template %s',
+      hgsprintf('%s:%s', $hg_node, 'tip'),
       '{node}\1{branches}\2');
 
     // Resolve all of the futures now. We don't need the 'commits' future yet,