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

src/applications/diffusion/controller/DiffusionRepositoryCreateController.php

@@ -43,7 +43,7 @@ final class DiffusionRepositoryCreateController
         $cancel_uri = $this->getApplicationURI('new/');
         break;
       default:
-        throw new Exception("Invalid edit operation!");
+        throw new Exception('Invalid edit operation!');
     }
 
     $form = id(new PHUIPagedFormView())
@@ -432,7 +432,7 @@ final class DiffusionRepositoryCreateController
         $is_mercurial = true;
         break;
       default:
-        throw new Exception("Unsupported VCS!");
+        throw new Exception('Unsupported VCS!');
     }
 
     $has_local = ($is_git || $is_mercurial);
@@ -478,7 +478,7 @@ final class DiffusionRepositoryCreateController
         "repository, use the //Import Only// option at the end of this ".
         "workflow.)");
     } else {
-      throw new Exception("Unsupported VCS!");
+      throw new Exception('Unsupported VCS!');
     }
 
     $page->addRemarkupInstructions($instructions, 'remoteURI');
@@ -492,7 +492,7 @@ final class DiffusionRepositoryCreateController
     if (!strlen($v_remote)) {
       $c_remote->setError(pht('Required'));
       $page->addPageError(
-        pht("You must specify a URI."));
+        pht('You must specify a URI.'));
     } else {
       $proto = $this->getRemoteURIProtocol($v_remote);
 
@@ -623,7 +623,7 @@ final class DiffusionRepositoryCreateController
           'accessed over the `file://` protocol. Continue to the next step.'),
         'credential');
     } else {
-      throw new Exception("Unknown URI protocol!");
+      throw new Exception('Unknown URI protocol!');
     }
 
     if ($provides_type) {
@@ -735,7 +735,7 @@ final class DiffusionRepositoryCreateController
         ->setUser($viewer)
         ->addRemarkupInstructions(
           pht(
-            "Select access policies for this repository."))
+            'Select access policies for this repository.'))
         ->addControl($view_policy)
         ->addControl($edit_policy)
         ->addControl($push_policy);