use whitespace pattern

src/compiler/parse/index.ts

@@ -66,10 +66,10 @@ export class Parser {
 
 		if (this.html.children.length) {
 			let start = this.html.children[0] && this.html.children[0].start;
-			while (/\s/.test(template[start])) start += 1;
+			while (whitespace.test(template[start])) start += 1;
 
 			let end = this.html.children[this.html.children.length - 1] && this.html.children[this.html.children.length - 1].end;
-			while (/\s/.test(template[end - 1])) end -= 1;
+			while (whitespace.test(template[end - 1])) end -= 1;
 
 			this.html.start = start;
 			this.html.end = end;