abc:        abc
*.b.c:      *.b.c
*b.c        *b.c
# Comment
^X          ^X
^x          ^x
^Z          ^Z
"^a +b"     "^a +b"
^a\\.+b     ^a\\.+b
\N^a\d+b    \N^a\d+b
lsearch;DIR/aux-fixed/0002.quoted:  lookup succeeded
^(?-i)MiXeD-CD: Data found for case-dependent MiXeD-CD
^MiXeD-nCD: Data found for case-independent MiXeD-nCD