Is there a way to add space between form elements in Bootstrap 4? The code snippet below shows an example where the full name has spacing from '@' but the username does not have any. Any suggestions on how to fix this?
<form class="form-inline">
<label class="sr-only" for="inlineFormInputName2">Name</label>
<input type="text" class="form-control mb-2 mr-sm-2 mb-sm-0" id="inlineFormInputName2" placeholder="Jane Doe">
<label class="sr-only" for="inlineFormInputGroupUsername2">Username</label>
<div class="input-group mb-2 mr-sm-2 mb-sm-0">
<div class="input-group-addon">@</div>
<input type="text" class="form-control" id="inlineFormInputGroupUsername2" placeholder="Username">
</div>
<div class="form-check mb-2 mr-sm-2 mb-sm-0">
<label class="form-check-label">
<input class="form-check-input" type="checkbox"> Remember me
</label>
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>