Minor Tramp cleanups

* lisp/net/tramp-compat.el (tramp-compat-rx): Declare.

* lisp/net/tramp-integration.el (info-lookup-maybe-add-help):
Fix `rx' call.

lisp/net/tramp-cache.el

@@ -43,8 +43,7 @@
 ;;   existence, or "file-attributes" caches the result of the function
 ;;   `file-attributes'.  These entries have a timestamp, and they
 ;;   expire after `remote-file-name-inhibit-cache' seconds if this
-;;   variable is set.  These properties are taken into account only if
-;;   the connection is established, or `non-essential' is nil.
+;;   variable is set.
 ;;
 ;; - The key is a process.  These are temporary properties related to
 ;;   an open connection.  Examples: "scripts" keeps shell script

lisp/net/tramp-compat.el

@@ -36,6 +36,7 @@
 (require 'shell)
 (require 'subr-x)
 
+(declare-function tramp-compat-rx "tramp")
 (declare-function tramp-error "tramp")
 (declare-function tramp-file-name-handler "tramp")
 (declare-function tramp-tramp-file-p "tramp")

lisp/net/tramp-integration.el

@@ -217,12 +217,12 @@ NAME must be equal to `tramp-current-connection'."
   (info-lookup-maybe-add-help
    :mode 'tramp-info-lookup-mode :topic 'symbol
    :regexp (rx (+ (not (any "\t\n \"'(),[]`‘’"))))
-   :doc-spec '(("(tramp)Function Index" nil
-		(rx bol blank (+ "-") blank (* nonl) ": ")
-		(rx (| blank eol)))
+   :doc-spec `(("(tramp)Function Index" nil
+		,(rx bol blank (+ "-") blank (* nonl) ":" blank)
+		,(rx (| blank eol)))
 	       ("(tramp)Variable Index" nil
-		(rx bol blank (+ "-") blank (* nonl) ": ")
-		(rx (| blank eol)))))
+		,(rx bol blank (+ "-") blank (* nonl) ":" blank)
+		,(rx (| blank eol)))))
 
   (add-hook
    'tramp-integration-unload-hook