fix(editor): match parser fence whitespace

src/renderer/src/components/editor/markdown-fence-scanner.ts

@@ -13,16 +13,13 @@ function hasClosingSuffix(content: string, start: number, end: number): boolean
   let sawWhitespace = false
   for (let index = start; index < end; index += 1) {
     const character = content.charCodeAt(index)
-    if (character === 32 || character === 9 || character === 13) {
+    if (character === 32) {
       sawWhitespace = true
       continue
     }
     if ((character === 126 || character === 96) && !sawWhitespace) {
       continue
     }
-    if (character !== 126 && character !== 96) {
-      return false
-    }
     return false
   }
   return true

src/renderer/src/components/editor/markdown-scanner-boundaries.test.ts

@@ -34,13 +34,16 @@ it.each(['\n', '\r\n', '\r'])('retains %j terminators while stripping code', (eo
   )
 })
 
-it.each(['```~~~', '``` ~', '      ```'])('matches the parser on the closer %j', (closer) => {
-  const source = `\`\`\`\ncode\n${closer}\n<div>after</div>\n`
-  const code = marked.lexer(source)[0]
-  expect(code.type).toBe('code')
-  expect(getMarkdownFenceRanges(source)).toEqual([[0, code.raw.length]])
-  expect(stripMarkdownCode(source).includes('<div>after</div>')).toBe(closer === '```~~~')
-})
+it.each(['```~~~', '``` ~', '```\t', '      ```'])(
+  'matches the parser on the closer %j',
+  (closer) => {
+    const source = `\`\`\`\ncode\n${closer}\n<div>after</div>\n`
+    const code = marked.lexer(source)[0]
+    expect(code.type).toBe('code')
+    expect(getMarkdownFenceRanges(source)).toEqual([[0, code.raw.length]])
+    expect(stripMarkdownCode(source).includes('<div>after</div>')).toBe(closer === '```~~~')
+  }
+)
 
 it.each(['-', '--', '---'])('keeps multiline spans after a bare %s line', (divider) => {
   const source = `Text\n${divider}\nA \`code\nspan\` here`