https://bugs.exim.org/show_bug.cgi?id=1884

            Bug ID: 1884
           Summary: Misleading documentation about \num escapes
           Product: PCRE
           Version: 8.39
          Hardware: x86
                OS: All
            Status: NEW
          Severity: bug
          Priority: medium
         Component: Documentation
          Assignee: p...@hermes.cam.ac.uk
          Reporter: firas....@gmail.com
                CC: pcre-dev@exim.org

The documentation (read from PCRE.txt on pcre.org/pcre.txt) states the
following:

       \81    is either a back reference, or a binary zero
                 followed by the two characters "8" and "1"

But after some testing I have come to find out it actually seems to treat it as
an escaped literal 8 followed by a literal 1.

This is either a bug in the documentation or the code, I believe.

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