Bootstrap class: .mr-1 / mr-*-#

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<div class="mr-0 bg-primary d-inline-block">Spaced Div</div>
<div class="mr-1 bg-primary d-inline-block">Spaced Div</div>
<div class="mr-2 bg-primary d-inline-block">Spaced Div</div>
<div class="mr-3 bg-primary d-inline-block">Spaced Div</div>
<div class="mr-4 bg-primary d-inline-block">Spaced Div</div>
<div class="mr-5 bg-primary d-inline-block">Spaced Div</div>

<!-- respsonsive viariations -->
<div class="mr-sm-5 d-inline-block bg-primary">Spaced Div</div>
<div class="mr-md-5 d-inline-block bg-primary">Spaced Div</div>
<div class="mr-lg-5 d-inline-block bg-primary">Spaced Div</div>
<div class="mr-xl-5 d-inline-block bg-primary">Spaced Div</div>

Preview

Spaced Div
Spaced Div
Spaced Div
Spaced Div
Spaced Div
Spaced Div
Spaced Div
Spaced Div
Spaced Div
Spaced Div

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