dired-subdir-regexpdired-subdir-regexp is a variable defined in `
dired.el'. Its value is
"^. \\([^ ]+\\)\\(:\\)[ ]"Documentation: Regexp matching a maybe hidden subdirectory line in `ls -lR' output. Subexpression 1 is the subdirectory proper, no trailing colon. The match starts at the beginning of the line and ends after the end of the line (\n or \r). Subexpression 2 must end right before the \n or \r.