Change double quotes to single quotes.

Summary: Ran `arc lint --apply-patches --everything` over rP, mainly to change double quotes to single quotes where appropriate. These changes also validate that the `ArcanistXHPASTLinter::LINT_DOUBLE_QUOTE` rule is working as expected.

Test Plan: Eyeballed it.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley, Korvin, hach-que

Differential Revision: https://secure.phabricator.com/D9431

Author: joshuaspence

resources/sql/patches/059.engines.php

@@ -24,7 +24,7 @@
   echo "Converting {$name}...\n";
   queryfx(
     $conn,
-    "ALTER TABLE %T.%T ENGINE=InnoDB",
+    'ALTER TABLE %T.%T ENGINE=InnoDB',
     $table['db'],
     $table['tbl']);
 }

resources/sql/patches/079.nametokenindex.php

@@ -7,10 +7,10 @@
 $table->beginReadLocking();
 
 $users = $table->loadAll();
-echo count($users)." users to index";
+echo count($users).' users to index';
 foreach ($users as $user) {
   $user->updateNameTokens();
-  echo ".";
+  echo '.';
 }
 
 $table->endReadLocking();