Fix errors found by PHPStan

Test Plan:
Ran `phpstan analyze -a autoload.php arcanist/src` with `autoload.php` containing:

  <?php
  require_once 'libphutil/src/__phutil_library_init__.php';
  require_once 'arcanist/src/__phutil_library_init__.php';

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D17367

src/land/ArcanistGitLandEngine.php

@@ -59,7 +59,7 @@ final class ArcanistGitLandEngine
 
   public function __destruct() {
     if ($this->restoreWhenDestroyed) {
-      $this->writeWARN(
+      $this->writeWarn(
         pht('INTERRUPTED!'),
         pht('Restoring working copy to its original state.'));
 

src/lint/linter/ArcanistBaseXHPASTLinter.php

@@ -189,7 +189,7 @@ abstract class ArcanistBaseXHPASTLinter extends ArcanistFutureLinter {
    * Get a path's parse exception from the responsible linter.
    *
    * @param   string          Path to retrieve exception for.
-   * @return  Exeption|null   Parse exception, if available.
+   * @return  Exception|null  Parse exception, if available.
    * @task sharing
    */
   final protected function getXHPASTExceptionForPath($path) {

src/lint/linter/__tests__/ArcanistClosureLinterTestCase.php

@@ -3,11 +3,14 @@
 final class ArcanistClosureLinterTestCase
   extends ArcanistExternalLinterTestCase {
 
-  public function testLinter() {
+  protected function getLinter() {
     $linter = new ArcanistClosureLinter();
     $linter->setFlags(array('--additional_extensions=lint-test'));
+    return $linter;
+  }
 
-    $this->executeTestsInDirectory(dirname(__FILE__).'/gjslint/', $linter);
+  public function testLinter() {
+    $this->executeTestsInDirectory(dirname(__FILE__).'/gjslint/');
   }
 
 }

src/unit/parser/__tests__/XUnitTestResultParserTestCase.php

@@ -28,7 +28,7 @@ final class XUnitTestResultParserTestCase extends PhutilTestCase {
       $parsed_results = id(new ArcanistXUnitTestResultParser())
         ->parseTestResults('');
 
-      $this->failTest(pht('Should throw on empty input'));
+      $this->assertFailure(pht('Should throw on empty input'));
     } catch (Exception $e) {
       // OK
     }
@@ -43,7 +43,7 @@ final class XUnitTestResultParserTestCase extends PhutilTestCase {
       $parsed_results = id(new ArcanistXUnitTestResultParser())
         ->parseTestResults($stubbed_results);
 
-      $this->failTest(pht('Should throw on non-xml input'));
+      $this->assertFailure(pht('Should throw on non-xml input'));
     } catch (Exception $e) {
       // OK
     }

src/workflow/ArcanistLandWorkflow.php

@@ -514,9 +514,7 @@ EOTEXT
     $this->branch = head($branch);
     $this->keepBranch = $this->getArgument('keep-branch');
 
-    $update_strategy = $this->getConfigFromAnySource(
-      'arc.land.update.default',
-      'merge');
+    $update_strategy = $this->getConfigFromAnySource('arc.land.update.default');
     $this->shouldUpdateWithRebase = $update_strategy == 'rebase';
     if ($this->getArgument('update-with-rebase')) {
       $this->shouldUpdateWithRebase = true;

src/workflow/ArcanistLintWorkflow.php

@@ -227,7 +227,7 @@ EOTEXT
     }
 
     if ($everything) {
-      $paths = iterator_to_array($this->getRepositoryApi()->getAllFiles());
+      $paths = iterator_to_array($this->getRepositoryAPI()->getAllFiles());
       $this->shouldLintAll = true;
     } else {
       $paths = $this->selectPathsForWorkflow($paths, $rev);

src/workflow/ArcanistStartWorkflow.php

@@ -76,7 +76,7 @@ EOTEXT
       "%s:  %s\n\n",
       pht('Started'),
       implode(', ', ipull($phid_query, 'fullName')));
-    $this->printCurrentTracking(true);
+    $this->printCurrentTracking();
   }
 
 }

src/workflow/ArcanistStopWorkflow.php

@@ -105,7 +105,7 @@ EOTEXT
       "%s  %s\n\n",
       pht('Stopped:'),
       implode(', ', ipull($phid_query, 'fullName')));
-    $this->printCurrentTracking(true);
+    $this->printCurrentTracking();
   }
 
 }

src/workflow/ArcanistTasksWorkflow.php

@@ -81,7 +81,7 @@ EOTEXT
     $unassigned = $this->getArgument('unassigned');
 
     if ($owner) {
-      $owner_phid = $this->findOwnerPhid($owner);
+      $owner_phid = $this->findOwnerPHID($owner);
     } else if ($unassigned) {
       $owner_phid = null;
     } else {

src/workflow/ArcanistUnitWorkflow.php

@@ -140,7 +140,7 @@ EOTEXT
     }
 
     if ($everything) {
-      $paths = iterator_to_array($this->getRepositoryApi()->getAllFiles());
+      $paths = iterator_to_array($this->getRepositoryAPI()->getAllFiles());
     } else {
       $paths = $this->selectPathsForWorkflow($paths, $rev);
     }

src/workflow/ArcanistWorkflow.php

@@ -1008,9 +1008,7 @@ abstract class ArcanistWorkflow extends Phobject {
         }
         $should_commit = true;
       } else {
-        $permit_autostash = $this->getConfigFromAnySource(
-          'arc.autostash',
-          false);
+        $permit_autostash = $this->getConfigFromAnySource('arc.autostash');
         if ($permit_autostash && $api->canStashChanges()) {
            echo pht(
             'Stashing uncommitted changes. (You can restore them with `%s`).',