fix(install): Enhance checks and code

- Opengrep complains about non quoted strings
- Bad indentation fixed

install.sh

@@ -35,8 +35,8 @@ if [ -z "$INSTALL_PATH" ]; then
 fi
 
 # ensure that $INSTALL_PATH is in the PATH
-if ! echo $PATH | grep -q $INSTALL_PATH; then
-    echo "Sorry, $INSTALL_PATH is not in the PATH"
+if ! echo "$PATH" | grep -q "$INSTALL_PATH"; then
+	echo "Sorry, ${INSTALL_PATH} is not in the PATH"
 	echo "Please, add it to your PATH in your shell configuration file"
 	echo "then restart your shell and run this script again"
 	exit 1
@@ -58,8 +58,8 @@ echo "Downloading $BIN_URL"
 T=$(mktemp -u)
 curl -SL -# $BIN_URL -o $T || (echo "Failed to download katenary" && rm -f $T && exit 1)
 
-mv $T $INSTALL_PATH/katenary
-chmod +x $INSTALL_PATH/katenary
+mv "$T" "${INSTALL_PATH}/katenary"
+chmod +x "${INSTALL_PATH}/katenary"
 echo
 echo "Installed to $INSTALL_PATH/katenary"
 echo "Installation complete! Run 'katenary help' to get started."