Detect Chinese sudo password prompts (Bug#31075)

* lisp/comint.el (comint-password-prompt-regexp): Allow text between
the prompt prefix and password equivalent.
* lisp/eshell/esh-mode.el (eshell-password-prompt-regexp): Accept some
unicode alternatives to ":".
* test/lisp/comint-tests.el (comint-testsuite-password-strings): Add
test case.

lisp/comint.el

@@ -360,7 +360,8 @@ This variable is buffer-local."
       "Kerberos" "CVS" "UNIX" " SMB" "LDAP" "PEM" "SUDO"
       "[sudo]" "Repeat" "Bad" "Retype")
     t)
-   " +\\)"
+   ;; Allow for user name to precede password equivalent (Bug#31075).
+   " +.*\\)"
    "\\(?:" (regexp-opt password-word-equivalents) "\\|Response\\)"
    "\\(?:\\(?:, try\\)? *again\\| (empty for no passphrase)\\| (again)\\)?"
    ;; "[[:alpha:]]" used to be "for", which fails to match non-English.

lisp/eshell/esh-mode.el

@@ -182,10 +182,11 @@ inserted.  They return the string as it should be inserted."
   :group 'eshell-mode)
 
 (defcustom eshell-password-prompt-regexp
-  (format "\\(%s\\).*:\\s *\\'" (regexp-opt password-word-equivalents))
+  (format "\\(%s\\)[^:：៖]*[:：៖]\\s *\\'" (regexp-opt password-word-equivalents))
   "Regexp matching prompts for passwords in the inferior process.
 This is used by `eshell-watch-for-password-prompt'."
   :type 'regexp
+  :version "27.1"
   :group 'eshell-mode)
 
 (defcustom eshell-skip-prompt-function nil

test/lisp/comint-tests.el

@@ -36,6 +36,7 @@
     "Enter same passphrase again: "     ; ssh-keygen
     "Passphrase for key root@GNU.ORG: " ; plink
     "[sudo] password for user:" ; Ubuntu sudo
+    "[sudo] user 的密码：" ; localized
     "Password (again):"
     "Enter password:"
     "Mot de Passe :" ; localized (Bug#29729)