[Bug localedata/20242] New: Wrong Unicode mapping for code units 0xFA and 0xFB in cp1125

["felix.von.s at posteo dot de" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=20242

            Bug ID: 20242
           Summary: Wrong Unicode mapping for code units 0xFA and 0xFB in
                    cp1125
           Product: glibc
           Version: 2.25
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: localedata
          Assignee: unassigned at sourceware dot org
          Reporter: felix.von.s at posteo dot de
                CC: libc-locales at sourceware dot org
  Target Milestone: ---

According to IBM documentation at [1], code unit 0xFA in code page 1125
corresponds to U+00F7 DIVISION SIGN and not U+00B7 MIDDLE DOT. Similarly, 0xFB
is U+00B1 PLUS-MINUS SIGN and not U+221A SQUARE ROOT.

The file localedata/charmaps/CP1125 points to the source code of the ICU
library as the source, but apparently it has never contained such a thing[2].

This mistake has already been copied by GNU libiconv, the Python encodings
module and probably others. Amusingly enough, it has also been incorporated
back into the ICU library: [3].

More generally, it might be advisable to look for other incorrect mappings.

[1]
<https://www.ibm.com/support/knowledgecenter/SSEPGG_9.7.0/com.ibm.db2.luw.admin.nls.doc/doc/r0051847.html>
[2]
<https://web.archive.org/web/20030925042016/http://oss.software.ibm.com/cvs/icu/charset/data/ucm/ibm-1125_P100-1997.ucm?rev=1.1&content-type=text/x-cvsweb-markup>
[3]
<https://ssl.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-CP1125-2.3.3.ucm>

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