docs/70507: RE in BUG section of re_format(7) in obsolete notation

[Marian Cerny]

>Number:         70507
>Category:       docs
>Synopsis:       RE in BUG section of re_format(7) in obsolete notation
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-doc
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          doc-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Aug 16 01:40:22 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator:     Marian Cerny
>Release:        FreeBSD 5.2.1
>Organization:
>Environment:
FreeBSD potvorka 5.2.1-RELEASE FreeBSD 5.2.1-RELEASE #2: Sat Aug 14 14:06:07 CEST 2004
majo at potvorka:/usr/src/sys/i386/compile/POTVORKA  i386
>Description:
Shouldn't this paragraph in BUGS section in manual page of re_format:

     Back references are a dreadful botch, posing major problems for efficient
     implementations.  They are also somewhat vaguely defined (does
     `a\(\(b\)*\2\)*d' match `abbbd'?).  Avoid using them.

be

     Back references are a dreadful botch, posing major problems for efficient
     implementations.  They are also somewhat vaguely defined (does
     `a((b)*\2)*d' match `abbbd'?).  Avoid using them.

because `a\(\(b\)*\2\)*d' is in obsolete notation? Or does this bug concern only the obsolete REs?
>How-To-Repeat:
man 7 re_format
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: