Numbers written in a paragraph are wrongly changed to a Numbered list after a blank space is added

[vladikoff]

Original bug: mozilla/notes#429
Codepen Link for easy testing: https://codepen.io/vladikoff/pen/vWjGPe

I used the editor with GFM enabled from: https://github.com/szymonkups/ckeditor5-build-classic/tree/markdown_support

STR

• Enable Markdown GFM plugin
• Type a new line and type a number plus a space (example: 25 cakes)

Expected

The string should remain as 25 cakes

Actual

The 25 is converted to a 1. (markdown numbered list)

Details

I think Markdown numbered list should only activate if I type 1. (one plus a dot plus a space), but I might be wrong.

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[Reinmar]

I agree with both – that "." or ")" should be enforced (I actually thought it is) and that supporting only /1[\.)]/ makes sense since CKEditor 5 doesn't support the start attribute yet anyway.

[scofalik]

I also agree that this is a valid issue.

[vladikoff]

PR here: ckeditor/ckeditor5-autoformat#43

[Reinmar]

@szymonkups pointed out that it makes sense to support 1-9 because there are situations when you might write a different number than 1.