Documentation: Some fixes in the reference card

doc/orgcard.tex

@@ -276,7 +276,7 @@ are preserved on all copies.
 
 \section{Getting Started}
 %
-\vskip -1mm
+\vskip -2mm
 \beginexample%
 (add-to-list 'auto-mode-alist '("\\\\.org\$" . org-mode))
 (define-key global-map "\\C-cl" 'org-store-link)$^1$
@@ -314,6 +314,7 @@ are preserved on all copies.
 \metax{promote/demote current subtree}{M-S-LEFT/RIGHT}
 
 \metax{move subtree/list item up/down}{M-S-UP/DOWN}
+\metax{clone a subtree}{C-c C-x c}
 \metax{refile subtree}{C-c C-w}
 \metax{kill/copy subtree}{C-c C-x C-w/M-w}
 \metax{yank subtree}{C-c C-x C-y or C-y}