postgresql.conf

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/9.6/config-setting.html
Description:

I noticed on this page:
https://www.postgresql.org/docs/9.6/config-setting.html
There are a few places that an include statement is made like so:

include 'shared.conf'
include 'memory.conf'
include 'server.conf'

It may be that the CentOS 7 postgres package differs from the PostgreSQL
documentation here, but I noticed that in the postgresql.conf the syntax for
including has an "=" between the keyword and value:

#------------------------------------------------------------------------------
# CONFIG FILE INCLUDES
#------------------------------------------------------------------------------

# These options allow settings to be loaded from files other than the
# default postgresql.conf.

#include_dir = '' # include files ending in '.conf' from
# a directory, e.g., 'conf.d'
#include_if_exists = '' # include file only if it exists
#include = ''

Is the "=" not needed?