Make 'tis620-2533' character set be an alias for 'thai-iso8859-11'

* lisp/simple.el (what-cursor-position): Revert ad-hoc change
to work around tis620-2533 charset.
* lisp/w32-fns.el: Use thai-iso8859-11 instead of tis620-2533.
* lisp/international/mule-conf.el (tis620-2533): Now an alias
for thai-iso8859-11, not a separate character set.
* lisp/international/fontset.el (charset-script-alist): Add
thai-iso8859-11; fix entries for greek and hebrew.
(font-encoding-alist, font-encoding-charset-alist): Use
thai-iso8859-11 instead of tis620-2533.
* lisp/descr-text.el (describe-char): Remove the ad-hoc code
that assigns eight-bit-control characters to the eight-bit
charset.

lisp/descr-text.el

@@ -404,12 +404,6 @@ relevant to POS."
            (charset (if eight-bit-p 'eight-bit
                       (or (get-text-property pos 'charset)
                           (char-charset char))))
-           ;; TIS620.2533 overlaps eight-bit-control, but we want to
-           ;; show eight-bit for raw bytes, not some obscure character
-           ;; set no one heard of.
-           (charset (if (eq charset 'tis620-2533)
-                        'eight-bit
-                      charset))
            (composition (find-composition pos nil nil t))
            (component-chars nil)
            (display-table (or (window-display-table)

lisp/international/fontset.el

@@ -79,7 +79,7 @@
 	("cns11643.92p7-0" . chinese-cns11643-7)
 	("big5" . big5)
 	("viscii" . viscii)
-	("tis620" . tis620-2533)
+	("tis620" . thai-iso8859-11)
 	("microsoft-cp1251" . windows-1251)
 	("koi8-r" . koi8-r)
 	("jisx0213.2000-1" . japanese-jisx0213-1)
@@ -139,7 +139,7 @@
 	(cyrillic-iso8859-5 . iso-8859-5)
 	(greek-iso8859-7 . iso-8859-7)
 	(arabic-iso8859-6 . iso-8859-6)
-	(thai-tis620 . tis620-2533)
+	(thai-tis620 . thai-iso8859-11)
 	(latin-jisx0201 . jisx0201)
 	(katakana-jisx0201 . jisx0201)
 	(chinese-big5-1 . big5)
@@ -1233,11 +1233,12 @@ Done when `mouse-set-font' is called."
     (latin-iso8859-15 . latin)
     (latin-iso8859-16 . latin)
     (latin-jisx0201 . latin)
+    (thai-iso8859-11 . thai)
     (thai-tis620 . thai)
     (cyrillic-iso8859-5 . cyrillic)
     (arabic-iso8859-6 . arabic)
-    (greek-iso8859-7 . latin)
-    (hebrew-iso8859-8 . latin)
+    (greek-iso8859-7 . greek)
+    (hebrew-iso8859-8 . hebrew)
     (katakana-jisx0201 . kana)
     (chinese-gb2312 . han)
     (chinese-gbk . han)

lisp/international/mule-conf.el

@@ -201,6 +201,7 @@
 ;; plus nbsp
 (define-iso-single-byte-charset 'iso-8859-11 'thai-iso8859-11
   "ISO/IEC 8859/11" "Latin/Thai" 166 ?T nil "8859-11")
+(define-charset-alias 'tis620-2533 'thai-iso8859-11)
 
 ;; 8859-12 doesn't (yet?) exist.
 
@@ -229,14 +230,6 @@
   :code-space [32 127]
   :code-offset #x0E00)
 
-;; Fixme: doc for this, c.f. above
-(define-charset 'tis620-2533
-  "TIS620.2533"
-  :short-name "TIS620.2533"
-  :ascii-compatible-p t
-  :code-space [0 255]
-  :superset '(ascii eight-bit-control (thai-tis620 . 128)))
-
 (define-charset 'jisx0201
   "JISX0201"
   :short-name "JISX0201"

lisp/language/thai.el

@@ -36,7 +36,7 @@
   "8-bit encoding for ASCII (MSB=0) and Thai TIS620 (MSB=1)."
   :coding-type 'charset
   :mnemonic ?T
-  :charset-list '(tis620-2533))
+  :charset-list '(thai-iso8859-11))
 
 (define-coding-system-alias 'th-tis620 'thai-tis620)
 (define-coding-system-alias 'tis620 'thai-tis620)
@@ -47,7 +47,7 @@
 	  (charset thai-tis620)
 	  (coding-system thai-tis620 iso-8859-11 cp874)
 	  (coding-priority thai-tis620)
-	  (nonascii-translation . tis620-2533)
+	  (nonascii-translation . iso-8859-11)
 	  (input-method . "thai-kesmanee")
 	  (unibyte-display . thai-tis620)
 	  (features thai-util)

lisp/simple.el

@@ -1410,7 +1410,7 @@ in *Help* buffer.  See also the command `describe-char'."
 	(if (or (not coding)
 		(eq (coding-system-type coding) t))
 	    (setq coding (default-value 'buffer-file-coding-system)))
-	(if (and (>= char #x3fff80) (<= char #x3fffff))
+	(if (eq (char-charset char) 'eight-bit)
 	    (setq encoding-msg
 		  (format "(%d, #o%o, #x%x, raw-byte)" char char char))
 	  ;; Check if the character is displayed with some `display'

lisp/w32-fns.el

@@ -280,7 +280,7 @@ bit output with no translation."
   (w32-add-charset-info "iso8859-13" 'w32-charset-baltic 1257)
   (w32-add-charset-info "koi8-r" 'w32-charset-russian 20866)
   (w32-add-charset-info "iso8859-5" 'w32-charset-russian 28595)
-  (w32-add-charset-info "tis620-2533" 'w32-charset-thai 874)
+  (w32-add-charset-info "iso8859-11" 'w32-charset-thai 874)
   (w32-add-charset-info "windows-1258" 'w32-charset-vietnamese 1258)
   (w32-add-charset-info "ksc5601.1992" 'w32-charset-johab 1361)
   (w32-add-charset-info "mac-roman" 'w32-charset-mac 10000)