Russian letters

[Paul Pogonyshev <pogonyshev@gmx.net>]

Russian letters loaded from file and newly typed are different
character no matter if `unify-8859-on-...-mode's are active or
not.

Characters loaded from file:

  character: а (3664, #o7120, #xe50, U+0430)
    charset: cyrillic-iso8859-5 (Right-Hand Part of Latin/Cyrillic Alphabet (ISO/IEC 8859-5): ISO-IR-144.)
 code point: #x50
     syntax: w 	which means: word
   category: y:Cyrillic
buffer code: #x8C #xD0
  file code: #xD0 #xB0 (encoded by coding system mule-utf-8-unix)
    display: by this font (glyph code)
     -cronyx-Fixed-Medium-R-Normal--18-120-100-100-C-90-ISO8859-5 (#xD0)

Newly typed characters:

  character: а (332880, #o1212120, #x51450, U+0430)
    charset: mule-unicode-0100-24ff (Unicode characters of the range U+0100..U+24FF.)
 code point: #x28 #x50
     syntax: w 	which means: word
   category: y:Cyrillic
buffer code: #x9C #xF4 #xA8 #xD0
  file code: #xD0 #xB0 (encoded by coding system mule-utf-8-unix)
    display: by this font (glyph code)
     -Adobe-Courier-Medium-R-Normal--17-120-100-100-M-100-ISO10646-1 (#x430)

The latter are displayed as boxes on my machine, which makes editing
of Russian text impossible.  Reproducible with `emacs -Q'.  I consider
it a bug.

Paul