caddyfile: Fix caddy fmt nesting not decrementing

[matthewpi]

This is an extremely weird edge-case where if you had a environment variable {}
on one line, a comment on the next line, and the closing of the block on the
following line; the rest of the Caddyfile would be indented further than it
should've been.

ref; caddyserver/vscode-caddyfile#13

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A preview of what happens without this fix can be seen at https://streamable.com/ouziak

Formatting the file shown in the video worked fine before 635f075

Additional testing (or even a better way to handle this edge-case) would be appreciated.

[mholt]

Thanks for the quick PR! I don't really understand the bug yet, but I wonder if there's a more elegant way to fix this.

i.e. What is causing this condition case nesting == 1 && wasComment && ch == '}': to be so special... why is the nesting not getting decremented when it should be?

[matthewpi]

Thanks for the quick PR! I don't really understand the bug yet, but I wonder if there's a more elegant way to fix this.

i.e. What is causing this condition case nesting == 1 && wasComment && ch == '}': to be so special... why is the nesting not getting decremented when it should be?

I don't understand it either tbh, but I think I figured it out now with the latest commit. (Apologies for the not so wonderful commit names)

[mholt]

I LIKE THIS. 😄 (Indeed, a newline is a whitespace.)

Much better 👍 Thanks @matthewpi, good work! Appreciate your contribution.