Reimplement as a tokenizer with GFM parity

test/macros.test.ts

@@ -1,6 +1,8 @@
 import { ribbit } from './setup';
 
-const r = ribbit();
+const lib = ribbit();
+
+const spacePattern = / /g;
 
 const macros = [
     {
@@ -11,7 +13,7 @@ const macros = [
         name: 'npc',
         toHTML: ({ keywords }: any) => {
             const name = keywords.join(' ');
-            return '<a href="/NPC/' + name.replace(/ /g, '') + '">' + name + '</a>';
+            return '<a href="/NPC/' + name.replace(spacePattern, '') + '">' + name + '</a>';
         },
     },
     {
@@ -24,9 +26,9 @@ const macros = [
     },
 ];
 
-const h = new r.HopDown({ macros });
-const H = (md: string) => h.toHTML(md);
-const M = (html: string) => h.toMarkdown(html);
+const converter = new lib.HopDown({ macros });
+const H = (md: string) => converter.toHTML(md);
+const M = (html: string) => converter.toMarkdown(html);
 
 describe('Macros', () => {
     describe('self-closing', () => {
@@ -61,7 +63,8 @@ describe('Macros', () => {
         it('keyword stripped from data-keywords', () => {
             const html = H('@style(box verbatim\ncontent\n)');
             expect(html).toContain('data-keywords="box"');
-            expect(html).not.toMatch(/data-keywords="[^"]*verbatim/);
+            const verbatimKeywordPattern = /data-keywords="[^"]*verbatim/;
+            expect(html).not.toMatch(verbatimKeywordPattern);
         });
     });