MFMの((()))構文が顔文字と競合する対策としてタグ形式の構文も追加

src/mfm/parse/elements/motion.ts

@@ -9,7 +9,7 @@ export type TextElementMotion = {
 };
 
 export default function(text: string) {
-	const match = text.match(/^\(\(\((.+?)\)\)\)/);
+	const match = text.match(/^\(\(\((.+?)\)\)\)/) || text.match(/^<motion>(.+?)<\/motion>/);
 	if (!match) return null;
 	const motion = match[0];
 	return {

test/mfm.ts

@@ -40,11 +40,17 @@ describe('Text', () => {
 		});
 
 		it('motion', () => {
-			const tokens = analyze('(((Strawberry))) Pasta');
+			const tokens1 = analyze('(((Strawberry))) Pasta');
 			assert.deepEqual([
 				{ type: 'motion', content: '(((Strawberry)))', motion: 'Strawberry' },
 				{ type: 'text', content: ' Pasta' }
-			], tokens);
+			], tokens1);
+
+			const tokens2 = analyze('<motion>Strawberry</motion> Pasta');
+			assert.deepEqual([
+				{ type: 'motion', content: '<motion>Strawberry</motion>', motion: 'Strawberry' },
+				{ type: 'text', content: ' Pasta' }
+			], tokens2);
 		});
 
 		it('mention', () => {