Fixes #1500: Log messages exported to files are not separated by newlines

framework/CHANGELOG.md

@@ -6,6 +6,7 @@ Yii Framework 2 Change Log
 
 - Bug #1446: Logging while logs are processed causes infinite loop (qiangxue)
 - Bug #1497: Localized view files are not correctly returned (mintao)
+- Bug #1500: Log messages exported to files are not separated by newlines (omnilight, qiangxue)
 - Bug #1509: The SQL for creating Postgres RBAC tables is incorrect (qiangxue)
 - Bug: Fixed `Call to a member function registerAssetFiles() on a non-object` in case of wrong `sourcePath` for an asset bundle (samdark)
 - Enh #1293: Replaced Console::showProgress() with a better approach. See Console::startProgress() for details (cebe)

framework/yii/log/FileTarget.php

@@ -83,10 +83,7 @@ class FileTarget extends Target
 	 */
 	public function export()
 	{
-		$text = '';
-		foreach ($this->messages as $message) {
-			$text .= $this->formatMessage($message);
-		}
+		$text = implode("\n", array_map([$this, 'formatMessage'], $this->messages)) . "\n";
 		if (($fp = @fopen($this->logFile, 'a')) === false) {
 			throw new InvalidConfigException("Unable to append to log file: {$this->logFile}");
 		}