sgml-html-meta-auto-coding-function)
"A list of functions which attempt to determine a coding system.
-Each function in this list should be written to operate on the current
-buffer, but should not modify it in any way. It should take one
-argument SIZE, past which it should not search. If a function
-succeeds in determining a coding system, it should return that coding
-system. Otherwise, it should return nil.
-
-Any `coding:' tags present have a higher priority than the
-functions in this list."
+Each function in this list should be written to operate on the
+current buffer, but should not modify it in any way. The buffer
+will contain undecoded text of parts of the file. Each function
+should take one argument, SIZE, which says how many
+characters (starting from point) it should look at.
+
+If one of these functions succeeds in determining a coding
+system, it should return that coding system. Otherwise, it
+should return nil.
+
+If a file has a `coding:' tag, that takes precedence over these
+functions, so they won't be called at all."
:group 'files
:group 'mule
:type '(repeat function))