is_singular inline docs summary issue with the docs parser

[grapplerulrich]

The inline docs for is_singular is not being parsed correctly as the parser stops as the first dot instead of going to the end of the line.

Is the query for an existing single post of any post type (post, attachment, page, ... )?

​https://developer.wordpress.org/reference/functions/is_singular/

I expect it is easier to fix the inline documentation then to fix the parser.

A potential fix: Is the query for an existing single post of any post type (post, attachment, page, custom post types)?

[SergeyBiryukov]

In 40103:

Docs: Update the description of is_singular() and WP_Query::is_singular() to be parsed correctly by developer.wordpress.org.

Props grapplerulrich.
Fixes #39948.