Normalizes a quaternion.

In the following, A1 to An are optional batch dimensions.

quaternion A tensor of shape [A1, ..., An, 4], where the last dimension represents a quaternion.
eps A lower bound value for the norm that defaults to 1e-12.
name A name for this op that defaults to "quaternion_normalize".

A N-D tensor of shape [?, ..., ?, 1] where the quaternion elements have been normalized.

ValueError If the shape of quaternion is not supported.