nix develop: Add a test for arrays

tests/nix-shell.sh

@@ -98,3 +98,4 @@ nix_develop -f shell.nix shellDrv -c echo foo |& grep -q foo
 # Test 'nix print-dev-env'.
 source <(nix print-dev-env -f shell.nix shellDrv)
 [[ -n $stdenv ]]
+[[ ${arr1[2]} = "3 4" ]]

tests/shell.nix

@@ -20,6 +20,7 @@ let pkgs = rec {
     for pkg in $buildInputs; do
       export PATH=$PATH:$pkg/bin
     done
+    declare -a arr1=(1 2 "3 4" 5)
   '';
 
   stdenv = mkDerivation {