github / github/copilot-cli

Single tilde `~` is being used as markdown strikethrough markup when it should be double-tilde `~~`

Open
#1,936 3 comments 3 reactions 0 assignees View on GitHub
area:terminal-rendering
Dominant language
Shell
Stars
11.2k
Forks
1.9k
Avg merge
14h 16m
Merged PRs (30d)
6

Description

### Describe the bug

When AI agent is writing about approximates it uses a single tilde `~` e.g., ~2000. When it does a few approximations in one line it gets rendered as markdown strikethrough. However, according to my research (see sites like https://www.markdownguide.org/extended-syntax/#strikethrough) it should only do strikethrough if we bookend with double tilde `~~`.
Please fix the renderer so it requires double tilde and doesn't strikethrough random parts of output.

Additional note: it seems to only happen if the tildes are inside parentheses: "Make a fix (~2000 lines) and delete old file (~5000 lines)", rendering tilde outside the parentheses works fine. I think it's probably a regex bug or something.

### Affected version

1.0.2

### Steps to reproduce the behavior

1. Use this prompt: `I'm testing a bug with your markdown rendering, print this line exactly: "Make a fix (~2000 lines) and delete old file (~5000 lines)"
2. You can also have it test another line like "There are ~100 ways this bug might appear and ~5 ways to fix it ~10% of the time" and see that it renders fine

### Expected behavior

Make sure the markdown only does strikethrough when `~~` is used.

### Additional context

Image

Contributor guide

Open the contributing guide

Assessment

This issue has not been assessed yet.

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.