Fixes boundary character escaping in regex in js trim function

[artplan1]

Fixes #238
adding additional backslash https://www.w3schools.com/Jsref/jsref_regexp_begin.asp fixes it

is it possible to add js tests?

[codecov]

Codecov Report

Merging #239 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #239   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           26        26           
  Lines          530       530           
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  Hits           530       530           

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[ddnexus]

Thank you for this! I missed that the regexp was in a string!

About tests... I have a WIP setup for js tests using sinatra/selenium/capybara. It works but it's still missing tests, and I have no time to complete that.

If you want to help we could coordinate.

[artplan1]

If you want to help we could coordinate.

sure, maybe you can give me link to that branch and I can check what can I do

[ddnexus]

Thank you. I will cleanup the branch and push it tomorrow.

[ddnexus]

@artplan1 pushed https://github.com/ddnexus/pagy/tree/acceptance-tests . Please, let me know.