Allow dash to appear in hashtag

[jotaen]

Currently, only letters, digits, and underscores are allowed in hashtags.

I’m personally a big fan of kebab case, so I wonder whether there could be any disadvantage in extending the spec to allow dashes to appear in hashtags. So you could write all of the following:

• #helloWorld
• #hello_world
• #hello-world

I still don’t want to allow other punctuation such as dots or colons, because it’s important that hashtags can be used within sentences, e.g.:

2020-01-01
  1h Went to the #gym!
  1h Called #andy, we discussed politics
  1h #chores: dishes, laundry, windows

[vladdeSV]

I would like to add that this will be a breaking change, as I have some tags which are directly followed by a dash.

In Swedish, when combining words from different languages or shortenings, they are joined by a dash.

For instance, "ActiveDirectory integration" would be written (including shortening) in Swedish as "AD-integrationen". Because dashes are not part of tags, I have written sentences which are similar to (example):

1h fixat med #ad-integrationen

This would now result in a new tag #ad-integrationen.

Personally I am a big fan of kebab-case, and would like to see this in the next spec release. Just letting you know of possible incompatibilities.

[jotaen]

Yeah, I’m also not sure yet whether this works out. I think punctuation rules are quite different between languages, so I probably need to research this a bit to see how “safe” this proposal is.

In english, for example, the em-dash is also used without surrounding spaces. So if people used a regular dash instead of an em-dash for that, it would also break their tags.

Twitter, btw., doesn’t allow any special characters to appear in tags, only letters and digits.

[jotaen]

(Actually this is a feature discussion, so moving this over to Discussions.)

[jotaen]

For reference: resolved via #171