Обсуждение: clarify Regular Expression functions

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/10/static/functions-matching.html
Description:

9.7.3. POSIX Regular Expressions

I suggest a section for functions e.g. 9.7.3.0 Functions
Regular Expressions are applied using Functions:
substring
regexp_replace
etc. where these are links to the corresponding text

and the text for each function begin with the function name as a heading.