dartHooks.dartInstallHook: Add trailing newline

+1 -1
+1 -1
pkgs/build-support/dart/build-dart-application/hooks/dart-install-hook.sh
··· 40 41 if [ -z "${dontDartInstallCache-}" ]; then 42 postInstallHooks+=(dartInstallCacheHook) 43 - fi
··· 40 41 if [ -z "${dontDartInstallCache-}" ]; then 42 postInstallHooks+=(dartInstallCacheHook) 43 + fi