DEFUN ("detect-coding-string", Fdetect_coding_string, Sdetect_coding_string,
1, 2, 0,
- doc: /* Detect coding system of the text in STRING.
-Return a list of possible coding systems ordered by priority.
+ doc: /* Detect how the byte sequence in STRING is encoded.
+Return a list of possible coding systems used on decoding a byte
+sequence containing the bytes in STRING when the coding system
+`undecided' is specified. The list is ordered by priority decided in
+the current language environment.
If only ASCII characters are found, it returns a list of single element
`undecided' or its subsidiary coding system according to a detected