fix trailing whitespace

docs/finn/getting_started.rst

@@ -134,7 +134,7 @@ These are summarized below:
 * (optional) ``FINN_DOCKER_PREBUILT`` (default 0) if set to 1 then skip Docker image building and use the image tagged with ``FINN_DOCKER_TAG``.
 * (optional) ``FINN_DOCKER_RUN_AS_ROOT`` (default 0) if set to 1 then run Docker container as root, default is the current user.
 * (optional) ``FINN_DOCKER_GPU`` (autodetected) if not 0 then expose all Nvidia GPUs or those selected by ``NVIDIA_VISIBLE_DEVICES`` to Docker container for accelerated DNN training. Requires `Nvidia Container Toolkit <https://github.com/NVIDIA/nvidia-docker>`_
-* (optional) ``NVIDIA_VISIBLE_DEVICES`` (default "") specifies specific Nvidia GPUs to use in Docker container. Possible values are a comma-separated list of GPU UUID(s) or index(es) e.g. ``0,1,2``, ``all``, ``none``, or void/empty/unset. 
+* (optional) ``NVIDIA_VISIBLE_DEVICES`` (default "") specifies specific Nvidia GPUs to use in Docker container. Possible values are a comma-separated list of GPU UUID(s) or index(es) e.g. ``0,1,2``, ``all``, ``none``, or void/empty/unset.
 
 Supported Hardware
 ===================