white spaces when selecting data from dropdown - angularjs

Question

Hi I am creating a dropdown in angular js while selecting values some whitespaces are getting attached to dropdown values.
Template
<div class="row control-group">
<label class="col-xs-4 col-sm-4 col-md-3 col-lg-3 control-label">{{::'label.identity'|translate}}</label>
<div class="col-xs-7 col-sm-7 col-md-9 col-lg-9 controls">
<select id="selectIdentity" name="selectIdentity" required ng-trim="true" ng-change="changedValue(addUser.identityProvider)" ng-model="addUser.identityProvider" >
<!-- Empty option necessary for placeholder to work -->
<!-- <option value="">{{::'define.selectval'|translate}}</option> -->
<option ng-repeat="idprovider in identityProvider"
ui-select2="select2IdentityProvider"
class="selectIdentity"
ng-selected="identityProvider"
ui-select2="select2LocaleSettings">
{{idprovider}}
</option>
</select>
<span class="help-block"
ng-show="addUserForm.selectIdentity.$error.required">
{{::'error.required'|translate}}
</span>
</div>
</div>
JS code
$scope.identityProvider = ['Customer','Employee'];

Answer 1

Try something like this :-
<select id="selectIdentity" name="selectIdentity" ng-model="addUser.identityProvider">
<option value="">Select</option>
<option value="value 1">{{'Value 1'}}</option>
<option value="value 2">{{'Value 2}}</option>
</select>

Answer 2

This code tested and there are no white space:
<select class="select2_single form-control" ng-model="module_id" tabindex="-1" ng-init="get_model_value()" id="module_id">
<option ng-repeat="item in moduleData" ng-selected="item.selected" value="{{item.id}}">{{item.module}}</option>
</select>

Answer 3

this will hide the first white space in dropdown
<option value="" selected hidden />
this selected hidden will hide the white space
<select id="selectIdentity" name="selectIdentity" required ng-trim="true" ng-change="changedValue(addUser.identityProvider)" ng-model="addUser.identityProvider" >
<option value="" selected hidden />
<option ng-repeat="idprovider in identityProvider"
ui-select2="select2IdentityProvider"
class="selectIdentity"
ng-selected="identityProvider"
ui-select2="select2LocaleSettings">
{{idprovider}}
</option>
</select>