STYLE: Minor code tidying

...functionObjects/stateFunctionObject/stateFunctionObject.H

src/OpenFOAM/db/functionObjects/writeFile/writeFile.H

...PatchFields/derived/partialSlip/partialSlipFvPatchField.H

...lume/fields/fvPatchFields/derived/slip/slipFvPatchField.C

...ts/graphics/runTimePostProcessing/runTimePostProcessing.H

src/sampling/sampledSurface/sampledPlane/sampledPlane.C

src/sampling/sampledSurface/sampledSurface/sampledSurface.H

src/sampling/surfMeshSampler/plane/surfMeshPlaneSampler.C

...ampling/surfMeshSampler/surfMeshSampler/surfMeshSampler.H