"_" is removed in sidebar and search box from some header containing underscore

[nelson6e65]

• I confirm that this is an issue rather than a question.

Bug report

When I have a header (## ) that contains an underscore (_), the title in sidebar misses the _ character. Also, in the search box result title is displayed without _ and also is exclude from results if I type the title containing _.

The weird thing is that this does not happen in all cases:

NML_VERSION, in this case, works as expected.

PD: The link reference is ok, like in the screenshot that works fine (https://nelson6e65.github.io/php_nml/api/constants.html#nml-gettext-domain)

Version

• 0.14.8
• 1.0.0-alpha.32

Steps to reproduce

• Generate documentation
• View resulting page

What is expected?

• Headers containing _ are searchable.
• Display _ in sidebar and search box (from screenshot: NML_GETTEXT_DOMAIN)

What is actually happening?

_ is being hidden from sidebar and search in some cases

Other relevant information

• Your OS: Fedora 28
• Node.js version: v8.11.2
• Browser version: Chrome
• Is this a global or local install? Both
• Which package manager did you use for the install?

[nelson6e65]

If I escape _ in the title, they display well:

- ## NML_GETTEXT_DOMAIN
+ ## NML\_GETTEXT\_DOMAIN

Maybe is misinterpreted as markdown cursive in sidebar and search indexes?

[pajachiet]

Maybe a duplicate of #544 ?