Return type bug fixing.

Martin Brecht-Precht · Martin Brecht-Precht · commit 9051f61fc416 · 2018-12-01T13:57:03.000+01:00
diff --git a/src/Handler/CommonmarkHandler.php b/src/Handler/CommonmarkHandler.php
@@ -793,8 +793,11 @@ private function startLine()
 	 * @param string $string
 	 * @return $this
 	 */
-	private function append(string $string)
+	private function append(?string $string)
 	{
+		if ($string === null) {
+			return $this;
+		}
 		$this->output .= $string;
 		return $this;
 	}

Original file line number	Diff line number	Diff line change
`@@ -793,8 +793,11 @@ private function startLine()`
`793`	`793`	`* @param string $string`
`794`	`794`	`* @return $this`
`795`	`795`	`*/`
`796`		`- private function append(string $string)`
	`796`	`+ private function append(?string $string)`
`797`	`797`	`{`
	`798`	`+ if ($string === null) {`
	`799`	`+ return $this;`
	`800`	`+ }`
`798`	`801`	`$this->output .= $string;`
`799`	`802`	`return $this;`
`800`	`803`	`}`