Also apply esc to variable definition body

...components/gradient_waveforms/changing_gradient_blocks.jl

...components/gradient_waveforms/constant_gradient_blocks.jl

src/components/gradient_waveforms/no_gradient_blocks.jl

src/components/pulses/composite_pulses.jl

src/components/pulses/constant_pulses.jl

src/components/pulses/sinc_pulses.jl

src/components/readouts/ADCs.jl

src/containers/abstract.jl

src/containers/alternatives.jl

src/containers/base_sequences.jl

src/containers/building_blocks.jl

src/parts/spoilt_slice_selects.jl

src/parts/trapezoids.jl

src/variables.jl