feat: support backslash before bracket, fix #8

Author: antfu

src/index.ts

@@ -55,7 +55,7 @@ const MarkdownItGitHubAlerts: MarkdownIt.PluginWithOptions<MarkdownItGitHubAlert
   } = options
 
   const markerNameRE = markers === '*' ? '\\w+' : markers.join('|')
-  const RE = new RegExp(`^\\[\\!(${markerNameRE})\\]([^\\n\\r]*)`, matchCaseSensitive ? '' : 'i')
+  const RE = new RegExp(`^\\\\?\\[\\!(${markerNameRE})\\]([^\\n\\r]*)`, matchCaseSensitive ? '' : 'i')
 
   md.core.ruler.after('block', 'github-alerts', (state) => {
     const tokens = state.tokens

test/fixtures.test.ts

@@ -23,7 +23,7 @@ ${cssBase}
 `
 
 describe('fixtures', () => {
-  const files = import.meta.glob('./input/*.md', { as: 'raw', eager: true })
+  const files = import.meta.glob<string>('./input/*.md', { query: '?raw', eager: true, import: 'default' })
   const filter = process.env.FILTER
   Object.entries(files)
     .forEach(([path, content]) => {
@@ -47,7 +47,7 @@ describe('fixtures', () => {
           `<style>${CSS}</style>`,
         ].join('\n').trim().replace(/\r\n/g, '\n')
 
-        expect(rendered)
+        await expect(rendered)
           .toMatchFileSnapshot(path.replace('input', 'output').replace('.md', '.html'))
       })
     })

test/input/1.basic.md

@@ -9,7 +9,7 @@
 > [!IMPORTANT]
 > Crucial information necessary for users to succeed.
 
-> [!WARNING]
+> \[!WARNING]
 > Critical content demanding immediate user attention due to potential risks.
 
 > [!CAUTION]