Fixes fish version check

update.sh

@@ -158,7 +158,12 @@ function install_fish() {
 	fi
 
 	local current_version=$(fish --version | cut -d " " -f 3)
-	if [ $(echo "${current_version}\n3.4.0" | sort | head -1) != "3.4.0" ]
+	local current_version_test=$(cat <<EOF
+${current_version}
+3.4.0
+EOF
+				)
+	if [ $(echo "${current_version_test}" | sort | head -1) != "3.4.0" ]
 	then
 		echo "Wrong version of fish ${current_version}"
 		fish_good=1