[issue26302] cookies module allows commas in keys

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Ah, how can I missed this catch?

The simplest way is just move "-" to the start or the end of character list. The most error-proof way is to use re.escape().

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components: +Library (Lib)
keywords: +easy -3.5regression
nosy: +demian.brecht
stage:  -> needs patch
type:  -> behavior

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