* doc/coreutils.texi (sort invocation): Mention the conversion.
---
How about this followup, copying the comment from Pádraig's patch into
our documentation?
doc/coreutils.texi | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index 7561f2a..ed620f3 100644
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -4126,6 +4126,11 @@ sort invocation
@vindex POSIXLY_CORRECT
On older systems, @command{sort} supports an obsolete origin-zero
syntax @sam...@var{pos1} [...@var{pos2}]} for specifying sort keys.
+The sequence @samp{sort +...@var{a}.@var{x} -...@var{b}.@var{y}}
+translates to @samp{sort -...@var{a+1}.@var{x+1},@var{b}} if @var{y}
+is @samp{0} or absent, otherwise it translates to @samp{sort
+...@var{a+1}.@var{x+1},@var{b+...@var{y}}.
+
This obsolete behavior can be enabled or disabled with the
@env{_POSIX2_VERSION} environment variable (@pxref{Standards
conformance}); it can also be enabled when @env{POSIXLY_CORRECT} is
--
1.6.6.1
