Use actual dash-functional.el version in manual

* dash-template.texi: Set version flag DASHFNVER for
dash-functional.el alongside that for dash.el.
(Using in a package): Use it.

* dev/examples-to-info.el (create-info-file): Substitute package
version of dash-functional.el alongside that of dash.el.

* dash.texi: Regenerate manual.

dash-template.texi

@@ -1,7 +1,8 @@
 \input texinfo    @c -*- texinfo -*-
 @c %**start of header
 @setfilename dash.info
-@set DASHVER @c [[ version ]]
+@set DASHVER @c [[ dash-version ]]
+@set DASHFNVER @c [[ dash-functional-version ]]
 @settitle Dash: A modern list library for GNU Emacs.
 @documentencoding UTF-8
 @documentlanguage en
@@ -117,7 +118,7 @@ The same goes for the @file{dash-functional.el} library of function
 combinators:
 
 @lisp
-;; Package-Requires: ((dash "@value{DASHVER}") (dash-functional "1.2.0"))
+;; Package-Requires: ((dash "@value{DASHVER}") (dash-functional "@value{DASHFNVER}"))
 @end lisp
 
 @node Fontification of special variables

dash.texi

@@ -2,6 +2,7 @@
 @c %**start of header
 @setfilename dash.info
 @set DASHVER 2.17.0
+@set DASHFNVER 1.2.0
 @settitle Dash: A modern list library for GNU Emacs.
 @documentencoding UTF-8
 @documentlanguage en
@@ -132,7 +133,7 @@ The same goes for the @file{dash-functional.el} library of function
 combinators:
 
 @lisp
-;; Package-Requires: ((dash "@value{DASHVER}") (dash-functional "1.2.0"))
+;; Package-Requires: ((dash "@value{DASHVER}") (dash-functional "@value{DASHFNVER}"))
 @end lisp
 
 @node Fontification of special variables

dev/examples-to-info.el

@@ -195,8 +195,9 @@ FUNCTION may reference an elisp function, alias, macro or a subr."
     (with-temp-file "./dash.texi"
       (insert-file-contents-literally "./dash-template.texi")
 
-      (goto-and-remove "@c [[ version ]]")
-      (insert (lm-version "dash.el"))
+      (dolist (pkg '(dash dash-functional))
+        (goto-and-remove (format "@c [[ %s-version ]]" pkg))
+        (insert (lm-version (format "%s.el" pkg))))
 
       (goto-and-remove "@c [[ function-nodes ]]")
       (insert (mapconcat 'function-to-node