Fixes spacing around condition.

scripts/install_deps.sh

@@ -96,7 +96,7 @@ case $(uname -s) in
         brew update
         brew install boost
         brew install cmake
-        if ["$CI" = true]; then
+        if [ "$CI" = true ]; then
             brew upgrade cmake
             brew tap ethereum/ethereum
             brew install cpp-ethereum
@@ -394,4 +394,4 @@ case $(uname -s) in
         echo "If you would like to get your operating system working, that would be fantastic."
         echo "Drop us a message at https://gitter.im/ethereum/solidity."
         ;;
-esac
+esac