Extract parsePlain function

src/mfm/parse.ts

@@ -2,11 +2,18 @@ import parser from './parser';
 import { MfmForest } from './types';
 import { normalize } from './normalize';
 
-export default (source: string, plainText = false): MfmForest => {
+export default (source: string): MfmForest => {
 	if (source == null || source == '') {
 		return null;
 	}
 
-	const raw = plainText ? parser.plain.tryParse(source) : parser.root.tryParse(source) as MfmForest;
-	return normalize(raw);
+	return normalize(parser.root.tryParse(source));
 };
+
+export function parsePlain(source: string): MfmForest {
+	if (source == null || source == '') {
+		return null;
+	}
+
+	return normalize(parser.plain.tryParse(source));
+}