To make it more clear that the mtime of a directory does not affect
whether further sub-directories are examined, (they are examined
unconditionally).
* 'db_mtime' call add_message to add the file to the
* database.
*
- * o For each sub-directory of path, recursively call into this
- * same function.
+ * o For each sub-directory of path, recursively call into this
+ * same function.
*
* o Tell the database to update its time of 'path' to 'fs_mtime'
*