   (interactive "DIndex files in directory: ")
   (let ()
     (cscope-unix-index-files-internal
-     top-directory 
+     top-directory
      (format "Creating cscope index `%s' in:\n\t%s\n\n%s"
 	     cscope-database-file top-directory cscope-separator-line)
      nil)

; (C) Copyright 2000, Darryl Okahata, all rights reserved.
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ALPHA VERSION 0.85
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; This is a cscope interface for XEmacs.

;;      maintenance.
;;
;; "cscope-database-regexps"
;; 	List to force directory-to-cscope-database mappings.
;; 	This is a list of `(REGEXP DBLIST [ DBLIST ... ])', where:
;;
;; 	REGEXP is a regular expression matched against the current buffer's
;; 	current directory.  The current buffer is typically some source file,
;; 	and you're probably searching for some symbol in or related to this
;; 	file.  Basically, this regexp is used to relate the current directory
;; 	to a cscope database.  You need to start REGEXP with "^" if you want
;; 	to match from the beginning of the current directory.
;;
;; 	DBLIST is a list that contains one or more of:
;;
;; 	    ( DBDIR )
;; 	    ( DBDIR ( OPTIONS ) )
;; 	    ( t )
;; 	    t
;;
;; 	Here, DBDIR is a directory that contains a cscope database.  If only
;; 	DBDIR is specified, then that cscope database will be searched without
;; 	any additional cscope command-line options.  If OPTIONS is given, then
;; 	OPTIONS is a list of strings, where each string is a separate cscope
;; 	command-line option.
;;
;; 	In the case of "( t )", this specifies that the search is to use the
;; 	normal hierarchical database search.  This option is used to
;; 	explicitly search using the hierarchical database search either before
;; 	or after other cscope database directories.
;;
;; 	If "t" is specified (not inside a list), this tells the searching
;; 	mechanism to stop searching if a match has been found (at the point
;; 	where "t" is encountered).  This is useful for those projects that
;; 	consist of many subprojects.  You can specify the most-used
;; 	subprojects first, followed by a "t", and then followed by a master
;; 	cscope database directory that covers all subprojects.  This will
;; 	cause the most-used subprojects to be searched first (hopefully
;; 	quickly), and the search will then stop if a match was found.  If not,
;; 	the search will continue using the master cscope database directory.
;;
;; 	Here, `cscope-database-regexps' is generally not used, as the normal
;; 	hierarchical database search is sufficient for placing and/or locating
;; 	the cscope databases.  However, there may be cases where it makes
;; 	sense to place the cscope databases away from where the source files
;; 	are kept; in this case, this variable is used to determine the
;; 	mapping.
;;
;; 	This module searches for the cscope databases by first using this
;; 	variable; if a database location cannot be found using this variable,
;; 	then the current directory is searched, then the parent, then the
;; 	parent's parent, until a cscope database directory is found, or the
;; 	root directory is reached.  If the root directory is reached, the
;; 	current directory will be used.
;;
;; 	A cscope database directory is one in which EITHER a cscope database
;; 	file (e.g., "cscope.out") OR a cscope file list (e.g., "cscope.files")
;; 	exists.
;;
;; 	Here is an example of `cscope-database-regexps':
;;
;;		(setq cscope-database-regexps
;;		      '(
;;			( "^/users/jdoe/sources/proj1"
;;			  ( t )
;;			  ( "/users/jdoe/sources/proj2")
;;			  ( "/users/jdoe/sources/proj3")
;;			  t
;;			  ( "/some/master/directory" ("-d" "-I/usr/local/include") )
;;			  )
;;			( "^/users/jdoe/sources/gnome/"
;;			  ( "/master/gnome/database" ("-d") )
;;			  )
;;			))
;;
;; 	If the current buffer's directory matches the regexp,
;; 	"^/users/jdoe/sources/proj1", then the following search will be
;; 	done:
;;
;; 	    1. First, the normal hierarchical database search will be used to
;;	       locate a cscope database.
;;
;; 	    2. Next, searches will be done using the cscope database
;;	       directories, "/users/jdoe/sources/proj2" and
;;	       "/users/jdoe/sources/proj3".
;;
;; 	    3. If a match was found, searching will stop.
;;
;; 	    4. If a match was not found, searching will be done using
;;	       "/some/master/directory", and the command-line options "-d"
;;	       and "-I/usr/local/include" will be passed to cscope.
;;
;; 	If the current buffer's directory matches the regexp,
;; 	"^/users/jdoe/sources/gnome", then the following search will be
;; 	done:
;;
;; 	    The search will be done only using the directory,
;; 	    "/master/gnome/database".  The "-d" option will be passed to
;; 	    cscope.
;;
;; 	If the current buffer's directory does not match any of the above
;; 	regexps, then only the normal hierarchical database search will be
;; 	done.
;;
;;
;; * Other notes:
