diff --git a/parser/magicLinks.ts b/parser/magicLinks.ts
index b2706924..9bc83ef3 100644
--- a/parser/magicLinks.ts
+++ b/parser/magicLinks.ts
@@ -3,6 +3,11 @@ import {MagicLinkToken} from '../src/magicLink';
 import type {Config} from '../base';
 import type {Token} from '../src/index';
 
+const space = String.raw`[\p{Zs}\t]| |&#0*160;|&#x0*a0;`,
+	sp = `(?:${space})+`,
+	spdash = `(?:${space}|-)`,
+	magicLinkPattern = String.raw`(?:RFC|PMID)${sp}\d+\b|ISBN${sp}(?:97[89]${spdash}?)?(?:\d${spdash}?){9}[\dx]\b`;
+
 /**
  * 解析自由外链
  * @param wikitext
@@ -10,14 +15,10 @@ import type {Token} from '../src/index';
  * @param accum
  */
 export const parseMagicLinks = (wikitext: string, config: Config, accum: Token[]): string => {
-	const space = String.raw`[\p{Zs}\t]| |&#0*160;|&#x0*a0;`,
-		spdash = `(?:${space}|-)`,
-		regex = new RegExp(
-			String.raw`(^|[^\p{L}\d_])(?:(?:${config.protocol})(${extUrlCharFirst}${
-				extUrlChar
-			})|(?:RFC|PMID)(?:${space})+\d+\b|ISBN(?:${space})+(?:97[89]${spdash}?)?(?:\d${spdash}?){9}[\dx]\b)`,
-			'giu',
-		);
+	const regex = new RegExp(
+		String.raw`(^|[^\p{L}\d_])(?:(?:${config.protocol})(${extUrlCharFirst}${extUrlChar})|${magicLinkPattern})`,
+		'giu',
+	);
 	return wikitext.replace(regex, (m, lead: string, p1: string | undefined) => {
 		let url = lead ? m.slice(lead.length) : m;
 		if (p1) {
diff --git a/src/heading.ts b/src/heading.ts
index ed50dd26..da81b72b 100644
--- a/src/heading.ts
+++ b/src/heading.ts
@@ -94,7 +94,7 @@ export abstract class HeadingToken extends Token {
 				Parser.msg('unbalanced $1 in a section header', '"="'),
 			));
 		}
-		if (this.closest('html-attrs, table-attrs')) {
+		if (this.closest('html-attrs,table-attrs')) {
 			errors.push(generateForSelf(this, rect, 'parsing-order', 'section header in a HTML tag'));
 		}
 		if (boldQuotes.length % 2) {
diff --git a/src/index.ts b/src/index.ts
index da26bb8b..b2ad87b5 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -400,7 +400,7 @@ export class Token extends AstElement {
 		let errors = super.lint(start, re);
 		if (this.type === 'root') {
 			const record: Record<string, Set<CategoryToken | AttributeToken>> = {},
-				selector = 'category, html-attr#id, ext-attr#id, table-attr#id';
+				selector = 'category,html-attr#id,ext-attr#id,table-attr#id';
 			for (const cat of this.querySelectorAll<CategoryToken | AttributeToken>(selector)) {
 				let key;
 				if (cat.type === 'category') {
diff --git a/src/tagPair/ext.ts b/src/tagPair/ext.ts
index 66ee6312..1943a843 100644
--- a/src/tagPair/ext.ts
+++ b/src/tagPair/ext.ts
@@ -161,7 +161,7 @@ export abstract class ExtToken extends TagPairToken {
 	override lint(start = this.getAbsoluteIndex(), re?: RegExp): LintError[] {
 		const errors = super.lint(start, re),
 			rect = new BoundingRect(this, start);
-		if (this.name !== 'nowiki' && this.closest('html-attrs, table-attrs')) {
+		if (this.name !== 'nowiki' && this.closest('html-attrs,table-attrs')) {
 			errors.push(generateForSelf(this, rect, 'parsing-order', 'extension tag in HTML tag attributes'));
 		}
 		if (this.name === 'ref' && this.closest('heading-title')) {