Fixed 'if' statement syntax

install-unix.sh

@@ -36,7 +36,7 @@ echo "Configuring installation..."
 if [[ "$SHELL" == *"zsh" ]]; then 
     # ZSH
     echo "export PATH='/opt/grapp/bin:$PATH" >> ~/.zshrc
-else if [[ "$SHELL" == *"bash" ]]; then
+elif [[ "$SHELL" == *"bash" ]]; then
     # Bash
     echo "export PATH='/opt/grapp/bin:$PATH" >> ~/.bashrc
 fi