commandline-documentation: mention `sandbox` command again

(mistakenly got removed when restructuring)

commandline-documentation: mention `sandbox` command again
(mistakenly got removed when restructuring)
76294621 · Lennart Spitzner · 96448f0c · 76294621
Commit 76294621 authored Dec 15, 2014 by Lennart Spitzner
--- a/cabal-install/Distribution/Client/Setup.hs
+++ b/cabal-install/Distribution/Client/Setup.hs
@@ -235,6 +235,7 @@ globalCommand commands = CommandUI {
        , addCmd "register"
        , par
        , startGroup "sandbox"
+        , addCmd "sandbox"
        , addCmd "exec"
        , addCmdCustom "repl" "Open interpreter with access to sandbox packages."
        ] ++ if null otherCmds then [] else par