Input:
#define UNITY_DECLARE_TEX2D(tex) Texture2D tex; SamplerState sampler##tex
#define DECLARE_STACK_BASE(stackName) UNITY_DECLARE_TEX2D(stackName##_transtab);
DECLARE_STACK_BASE(VT)

Expected:
Texture2D VT_transtab; SamplerState samplerVT_transtab;
Actual:
Texture2D VT _transtab ; SamplerState samplerVT_transtab ;
(note the space between VT and _transtab)