Incorrect Parsing of Markdown with Special Characters Adjacent to Strong Tags in Non-English Contexts

[YvesRijckaert]

Initial checklist

• I read the support docs
• I read the contributing guide
• I agree to follow the code of conduct
• I searched issues and couldn’t find anything (or linked relevant results below)

Affected packages and versions

"remark-gfm": "^4.0.0", "remark-parse": "^11.0.0", "unified": "^11.0.4"

Link to runnable example

No response

Steps to reproduce

• Use remark-parse, remark-gfm, and unified packages to parse markdown content.

const processor = unified().use(remarkParse).use(remarkGfm);
const tree = processor.parse(md);
console.log(tree.children);

• Parse these two strings to see the different behaviour:

const markdownWithSpecialCharacter = '**test:**如李施德林';
const markdownWithoutSpecialCharacter = '**test**如李施德林';

• Observe that the raw markdown (**) is displayed instead of actual bold/strong text in the output, when there is a special character (here: :).

markdownWithSpecialCharacter:

[
  {
    "type": "paragraph",
    "children": [
      {
        "type": "text",
        "value": "**test:**如李施德林",
        "position": {
          "start": { "line": 1, "column": 1, "offset": 0 },
          "end": { "line": 1, "column": 15, "offset": 14 }
        }
      }
    ],
    "position": {
      "start": { "line": 1, "column": 1, "offset": 0 },
      "end": { "line": 1, "column": 15, "offset": 14 }
    }
  }
]

markdownWithoutSpecialCharacter:

[
  {
    "type": "paragraph",
    "children": [
      {
        "type": "strong",
        "children": [
          {
            "type": "text",
            "value": "test",
            "position": {
              "start": { "line": 1, "column": 3, "offset": 2 },
              "end": { "line": 1, "column": 7, "offset": 6 }
            }
          }
        ],
        "position": {
          "start": { "line": 1, "column": 1, "offset": 0 },
          "end": { "line": 1, "column": 9, "offset": 8 }
        }
      },
      {
        "type": "text",
        "value": "如李施德林",
        "position": {
          "start": { "line": 1, "column": 9, "offset": 8 },
          "end": { "line": 1, "column": 14, "offset": 13 }
        }
      }
    ],
    "position": {
      "start": { "line": 1, "column": 1, "offset": 0 },
      "end": { "line": 1, "column": 14, "offset": 13 }
    }
  }
]

Expected behavior

The markdown content should be parsed correctly, with the strong tag (**) properly converting text to bold, regardless of the presence of special characters or non-English text adjacent to the tags.

Actual behavior

• When a colon character is present next to a strong tag with non-English text following it, the markdown syntax is not correctly parsed, and the raw markdown is displayed.
• When non-English text is directly next to a strong tag without any special characters, the markdown is parsed correctly, and the text is bolded as expected.

Runtime

Node v17

Package manager

npm 8

OS

macOS

Build and bundle tools

Rollup

[wooorm]

https://spec.commonmark.org/dingus/?text=**test%3A**如李施德林

commonmark/commonmark-spec#650 (welcome to help come up with more real world examples here)