Outdated information in regex.Rd

The NEWS for R-devel has the following item:
The previously included versions of zlib, bzip2, xz and PCRE have
been removed, so suitable external (usually system) versions are
required (see the ?R Installation and Administration? manual).
Therefore I believe the following information in
'src/library/base/man/regex.Rd' is no longer valid:
If PCRE support was compiled from the sources within R, the PCRE
version is 8.36 as described here.

Mikko Korpela
Aalto University School of Science
Department of Computer Science
Mikko Korpela <mikko.korpela at aalto.fi>
    on Wed, 18 Nov 2015 11:35:14 +0200 writes:
> The NEWS for R-devel has the following item:
    >> The previously included versions of zlib, bzip2, xz and PCRE have
    >> been removed, so suitable external (usually system) versions are
    >> required (see the ?R Installation and Administration? manual).

    > Therefore I believe the following information in
    > 'src/library/base/man/regex.Rd' is no longer valid:

    >> If PCRE support was compiled from the sources within R, the PCRE
    >> version is 8.36 as described here.

Not quite.  It is still *valid* : every statement about the
elements of the empty set are true, in the same sense that

   if (FALSE)
     "something or other"

is never invalid, but of course, that information should still
be removed because indeed, it is empty.

Thank you Mikko!
      	  (and excuse the completely unnecessary pickyness ;-)
Mikko Korpela <mikko.korpela at aalto.fi>
    on Wed, 18 Nov 2015 11:35:14 +0200 writes:

    > The NEWS for R-devel has the following item:
    >> The previously included versions of zlib, bzip2, xz and PCRE have
    >> been removed, so suitable external (usually system) versions are
    >> required (see the ?R Installation and Administration? manual).

    > Therefore I believe the following information in
    > 'src/library/base/man/regex.Rd' is no longer valid:

    >> If PCRE support was compiled from the sources within R, the PCRE
    >> version is 8.36 as described here.
Not quite.  It is still *valid* : every statement about the
elements of the empty set are true, in the same sense that

   if (FALSE)
     "something or other"

is never invalid, but of course, that information should still
be removed because indeed, it is empty.

Thank you Mikko!
      	  (and excuse the completely unnecessary pickyness ;-)
Thanks, I see that you already edited the .Rd file. Furthermore, I
accept your pickiness ;-)

- Mikko

Mikko Korpela <mikko.korpela at aalto.fi>
   on Wed, 18 Nov 2015 11:35:14 +0200 writes:

The NEWS for R-devel has the following item:
The previously included versions of zlib, bzip2, xz and PCRE have
been removed, so suitable external (usually system) versions are
required (see the ?R Installation and Administration? manual).

Therefore I believe the following information in
'src/library/base/man/regex.Rd' is no longer valid:

If PCRE support was compiled from the sources within R, the PCRE
version is 8.36 as described here.
Not quite.  It is still *valid* : every statement about the
elements of the empty set are true, in the same sense that

  if (FALSE)
    "something or other"

is never invalid, but of course, that information should still
be removed because indeed, it is empty.
Help pages are not intended to be just about the current version of R but also recent versions, and most builds of 3.2.x will meet the condition.

However, as from 3.2.0 a user can find the version of PCRE in use by extSoftVersion, and I have added a comment about that, including for 3.2.3.
Thank you Mikko!
           (and excuse the completely unnecessary pickyness ;-)

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