The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/10/static/functions-matching.html
Description:
Example:
(as a heading) regexp_replace
The regexp_replace function provides ... patterns.
Syntax: regexp_replace(source, pattern, replacement [, flags ]).
Operation: The source string ... replacement text.
Flags: optional text ... behavior.
Flag g specifies ...
Other flags are described in Table 9.22.
I see no need to explicitly specify flag i, as it is in the Table.