STYLE: Fix indent in boundary files after createBafflesDict execution

Refer tutorial: $FOAM_TUTORIALS/incompressible/pimpleDyMFoam/oscillatingInletACMI2D

The boundary file looks like

    ACMI1_couple
    {
        type            cyclicACMI;
        inGroups
2
(
cyclicACMI
ACMI1
)
;
        nFaces          40;
        startFace       43680;
        matchTolerance  0.0001;
        transform       noOrdering;
        neighbourPatch  ACMI2_couple;
        nonOverlapPatch ACMI1_blockage;
    }

inGroups have incorrect indentation.

@mark