Engine: Handle trailing comments in ERB output tags

[marcoroth]

This pull request fixes an issue where ERB output tags ending with inline Ruby comments caused syntax errors when being compiled.

For example, this template:

<%= link_to "Root", root_path # this is the href %>

Previously compiled to:

_buf << (link_to "Root", root_path # this is the href).to_s;

The # starts a comment and will comment out ).to_s; which leads to runtime syntax errors. The fix adds a newline before closing parentheses when the code contains #:

_buf << (link_to "Root", root_path # this is the href
).to_s;

In the future, we could ideally omit/strip code comments altogether using Prism.

Fixes #964

[pkg-pr-new]

npx https://pkg.pr.new/@herb-tools/formatter@1083

npx https://pkg.pr.new/@herb-tools/language-server@1083

npx https://pkg.pr.new/@herb-tools/linter@1083

commit: 75a836b

[github-actions]

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