Im not sure if this idea might help, but I faced a similar problem in folding
blocks of text within email digests like that for vim_use. And I did not have
the stomach for fancy, script-based folding strategies. So I discovered
something simple. Here is a fold for blocks of text that appear within vim_use
digests:
1s/^.*$/Topic: ^M&/
g/^Topic: */,/^Topic: *\|\%$/-1fold
Each fold gets applied to a block that starts with Topic: and ends with the
line just before the next occurrence of Topic: This is similar to your
sections.
For the last fold, it ends at the file's last line, %$. I then insert a line
with Topic:, as the file's first line to ensure all blocks have a beginning
and end. Very simple, but works like a charm. However, sounds like you want
fold to happen dynamically as you type and edit?
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