broken iso-8-1 recognition dump

Version: 21.5

Recognition of iso-8-1 coding category is broken.  An attached file is
iso-8859-5 text (mixed Russian and English).  It contains only
characters allowed in iso 8-bit codings.  iso-8-1 detector from 21.4
detects it as such, and detecting it as iso-8-1 (at least
"slightly-likely") in 21.5 is also expected.

Fortunately, the beginning and end of file do not contain 8-bit
characters, so debug print does not abort on it.  So this is how
iso-8-1 recognition fails.

detect_coding_type: processing 212 bytes
First 16: As I would not b  41 73 20 49 20 77 6F 75 6C 64 20 6E 6F 74 20 62
Last 16: 9 - 1865), 1854.  39 20 2D 20 31 38 36 35 29 2C 20 31 38 35 34 0A
seen_non_ascii: 1
no-conversion: slightly-likely
utf-8: nearly-impossible
utf-8-bom: nearly-impossible
ucs-4: nearly-impossible
utf-16: as-likely-as-unlikely
utf-16-little-endian: as-likely-as-unlikely
utf-16-bom: as-likely-as-unlikely
utf-16-little-endian-bom: as-likely-as-unlikely
iso-7: somewhat-unlikely
iso-8-designate: somewhat-unlikely
iso-8-1: somewhat-unlikely
iso-8-2: somewhat-unlikely
iso-lock-shift: somewhat-unlikely
shift-jis: nearly-impossible
big5: nearly-impossible
detect_coding_type: returning 0 (keep going)
detected coding system: #<coding-system raw-text no-conversion>

As I would not be a slave, so I would not be a master - This expresses
my idea of democracy.

Я одинаково не хочу быть ни рабом, ни хозяином. Таково мое понимание
демократии.

Авраам Линкольн (1809 - 1865), 1854