1# metacharacters, backslashes
2a.c                 &         abc       abc
3a[bc]d              &         abd       abd
4a\*c                &         a*c       a*c
5a\\b                &         a\b       a\b
6a\\\*b              &         a\*b      a\*b
7# legacy escape
8#a\bc               &         abc       abc
9a\                  &C        EESCAPE
10a\\bc               &         a\bc      a\bc
11\{                  bC        BADRPT
12a\[b                &         a[b       a[b
13a[b                 &C        EBRACK
14# trailing $ is a peculiar special case for the BRE code
15a$                  &         a         a
16a$                  &         a$
17a\$                 &         a
18a\$                 &         a$        a$
19a\\$                &         a
20a\\$                &         a$
21a\\$                &         a\$
22a\\$                &         a\        a\
23