leanprover-community.github.io
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extra `calc` style
I find this style pretty convenient, as it has vertical alignment AND ease of editing.
You insert an extra underscore there? I didn't know that.
Did you discuss on Zulip to add this to the style? Seems reasonable to me, but it is also pretty confusing (it seems like you're applying reverse (reverse (a :: l)) to _)
It was discussed on Zulip here.
it seems like you're applying
reverse (reverse (a :: l))to_
If you indent the LHS more, I doubt this confusion can really arise.