[Bug] language:markdown italic error

描述

Language:markdown

_italic_
$a_{1}$:expect normal but italic$b_{1}$
$a_{1}$:normal$b$
*italic*

贡献者指南

技术栈

typescript

领域

frontend

议题类型

bug

难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。

3

预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。

half day

活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。

stale

清晰度议题是否清楚说明期望改动、验收标准和下一步。

mostly clear

前置要求

Knowledge of TextMate grammarsFamiliarity with monaco editor's tokenizer

新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。

50

研究方向

The issue is that underscores inside math formulas ($...$) are incorrectly rendered as italic in markdown. The fix likely involves modifying the markdown language grammar (e.g., markdown.tmLanguage.json or monarch tokenizer rules) to disable italic inside math environments. Look at the existing grammar files in src/language/markdown/, particularly the tokenizer rules for ` ` and `*`. Investigate how math formulas are tokenized and ensure that underscores inside $...$ are not treated as emphasis markers. Test with the provided example after making changes.