changelogger: Normalize UTC timezone (#37436)

It seems that some versions of git may be returning `Z` rather than
`+00:00` when reporting timezones from `%cI`, which broke a test.
Normalize it to `Z` always so the test can have a consistent value to
expect.

projects/packages/changelogger/changelog/fix-changelogger-getRepoData-test

@@ -0,0 +1,5 @@
+Significance: patch
+Type: changed
+Comment: Fix test by always using `Z`, not `+00:00`, for UTC timezones. No functionality change as both are equivalent ISO timestamps.
+
+

projects/packages/changelogger/src/Application.php

@@ -19,7 +19,7 @@
  */
 class Application extends SymfonyApplication {
 
-	const VERSION = '4.2.3';
+	const VERSION = '4.2.4-alpha';
 
 	/**
 	 * Constructor.

projects/packages/changelogger/src/Utils.php

@@ -171,6 +171,10 @@ public static function getRepoData( $file, OutputInterface $output, DebugFormatt
 				// Timestamp.
 				if ( isset( $cmd_output[0] ) && preg_match( '/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(?:Z|[+-]\d{2}:\d{2})$/', $cmd_output[0] ) ) {
 					$repo_data['timestamp'] = $cmd_output[0];
+					// Normalize UTC
+					if ( substr( $repo_data['timestamp'], -6 ) === '+00:00' ) {
+						$repo_data['timestamp'] = substr( $repo_data['timestamp'], 0, -6 ) . 'Z';
+					}
 				}
 
 				// PR number.

projects/packages/changelogger/tests/php/tests/src/UtilsTest.php

@@ -390,7 +390,7 @@ public function testGetRepoData() {
 
 		$this->assertSame(
 			array(
-				'timestamp' => '2021-02-02T22:22:22+00:00',
+				'timestamp' => '2021-02-02T22:22:22Z',
 				'pr-num'    => '123',
 			),
 			Utils::getRepoData( 'in-git.txt', $output, $helper )
@@ -399,7 +399,7 @@ public function testGetRepoData() {
 		// Test the second commit.
 		$this->assertSame(
 			array(
-				'timestamp' => '2021-02-02T22:22:22+00:00',
+				'timestamp' => '2021-02-02T22:22:22Z',
 				'pr-num'    => '124',
 			),
 			Utils::getRepoData( 'in-git2.txt', $output, $helper )