Trim all whitespace in elements written to hugo_stats.json

[yaaax]

What version of Hugo are you using (hugo version)?

$ hugo version
Hugo Static Site Generator v0.78.2/extended darwin/amd64 BuildDate: unknown

Does this issue reproduce with the latest release?

Yes

---

I have a markdown content file with a form element declared on several lines :

<form
  action="[URL]"
  method="POST"
>

I run hugo server -e production

EXPECTED: a "form" tag is added in hugo_stats.json tags list
ACTUAL: a "form\n" tag is added in hugo_stats.json tags list

Note: The issue does not happen if the form is declared in one line :

<form action="[URL]" method="POST">

[udaya2899]

I'm looking to contribute to Hugo. This will be my first issue in a big project. Let me know if this is simple enough for me to make as a PR. Also, please guide me with more context if any.

Edit: As far as I understand, the whitespaces like \n \t should be trimmed from hugo_stats.json

Edit2: Would using json.Compact work for this? Source: https://stackoverflow.com/questions/24777101/how-to-remove-all-spaces-newlines-tabs-from-byte-array

[bep]

Edit2: Would using json.Compact

I don't know what that does, but I was thinking more inline of doing strings.TrimSpace on all the Classes, IDs etc. in

https://github.com/gohugoio/hugo/blob/master/publisher/htmlElementsCollector.go#L233

[yaaax]

My skills in Go language are pretty poor at the moment, I let you fix that one 😅
Happy to see the fix for a bit of learning.

My 2 cents : trimming the spaces while parsing HTML elements, as suggested by @bep, is probably more efficient than calling a function like json.Compact after building an entire json.

[udaya2899]

@bep

https://github.com/gohugoio/hugo/blob/master/publisher/htmlElementsCollector.go#L234 has the strings.TrimSpace already. Am I missing something then?

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