Using gh to browse a file with given line number does not work with Markdown files.

Using gh to browse a file with given line number does not work with Markdown files.: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). Looks like a ?plain=1 parameter was added to GitHub Web UI…

The task

Looks like a `?plain=1` parameter was [added to GitHub Web UI](https://github.blog/changelog/2021-06-30-parameter-to-disable-markdown-rendering/) to specifically help navigate to Markdown lines.

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.