Fix regex repetition of repetitions

Problems reported by Mattias Engdegård in:
https://lists.gnu.org/r/emacs-devel/2019-12/msg00066.html
* lisp/gnus/gnus-util.el (gnus-emacs-version):
* lisp/mail/rfc2368.el (rfc2368-mailto-regexp):
* lisp/net/tramp-sh.el (tramp-sh-inotifywait-process-filter):
* lisp/obsolete/terminal.el (te-parse-program-and-args):
* lisp/org/org-table.el (org-table-wrap-region):
* lisp/progmodes/verilog-mode.el (verilog-inject-inst):
Avoid repetition-of-repetition in regexp.

lisp/gnus/gnus-util.el

@@ -1574,7 +1574,7 @@ sequence, this is like `mapcar'.  With several, it is like the Common Lisp
     (cond
      ((not (memq 'emacs lst))
       nil)
-     ((string-match "^\\(\\([.0-9]+\\)*\\)\\.[0-9]+$" emacs-version)
+     ((string-match "^[.0-9]*\\.[0-9]+$" emacs-version)
       (concat "Emacs/" emacs-version
 	      (if system-v
 		  (concat " (" system-v ")")

lisp/mail/rfc2368.el

@@ -61,7 +61,7 @@
 ;; only an approximation?
 ;; see rfc 1738
 (defconst rfc2368-mailto-regexp
-  "^\\(mailto:\\)\\([^?]+\\)*\\(\\?\\(.*\\)\\)*"
+  "^\\(mailto:\\)\\([^?]+\\)?\\(\\?\\(.*\\)\\)*"
   "Regular expression to match and aid in parsing a mailto url.")
 
 ;; describes 'mailto:'

lisp/net/tramp-sh.el

@@ -3799,7 +3799,7 @@ Fall back to normal file name handler if no Tramp handler exists."
       (unless (string-match
 	       (eval-when-compile
 		 (concat "^[^[:blank:]]+"
-			 "[[:blank:]]+\\([^[:blank:]]+\\)+"
+			 "[[:blank:]]+\\([^[:blank:]]+\\)"
 			 "\\([[:blank:]]+\\([^\n\r]+\\)\\)?"))
 	       line)
 	(tramp-error proc 'file-notify-error "%s" line))

lisp/obsolete/terminal.el

@@ -1166,7 +1166,7 @@ subprocess started."
 	 (let ((l ()) (p 0))
 	   (while p
 	     (setq l (cons (if (string-match
-				"\\([-a-zA-Z0-9+=_.@/:]+\\)\\([ \t]+\\)*"
+				"\\([-a-zA-Z0-9+=_.@/:]+\\)[ \t]*"
 				s p)
 			       (prog1 (substring s p (match-end 1))
 				 (setq p (match-end 0))

lisp/org/org-table.el

@@ -4642,7 +4642,7 @@ blank, and the content is appended to the field above."
 	(skip-chars-backward " ")
 	(insert " " (org-trim s))
 	(org-table-align)))
-     ((looking-at "\\([^|]+\\)+|")	; Split field.
+     ((looking-at "\\([^|]+\\)|")	; Split field.
       (let ((s (match-string 1)))
 	(replace-match " |")
 	(goto-char (match-beginning 0))

lisp/progmodes/verilog-mode.el

@@ -10973,7 +10973,7 @@ shown) will make this into:
 		(t
 		 ;; Delete identical interconnect
                  (let ((case-fold-search nil))  ; So we don't convert upper-to-lower, etc
-		   (while (verilog-re-search-forward-quick "\\.\\s *\\([a-zA-Z0-9`_$]+\\)*\\s *(\\s *\\1\\s *)\\s *" end-pt t)
+		   (while (verilog-re-search-forward-quick "\\.\\s *\\([a-zA-Z0-9`_$]+\\)?\\s *(\\s *\\1\\s *)\\s *" end-pt t)
 		     (delete-region (match-beginning 0) (match-end 0))
                      (setq end-pt (- end-pt (- (match-end 0) (match-beginning 0))))  ; Keep it correct
 		     (while (or (looking-at "[ \t\n\f,]+")