Remove unnecessary line breaks from tabs component

src/components/tabs/template.njk

@@ -1,12 +1,11 @@
 {#- If an id 'prefix' is not passed, fall back to using the name attribute
    instead. We need this for error messages and hints as well -#}
-{% set idPrefix = params.idPrefix if params.idPrefix %}
+{% set idPrefix = params.idPrefix if params.idPrefix -%}
 
 <div {%- if params.id %} id="{{params.id}}"{% endif %} class="govuk-tabs {%- if params.classes %} {{ params.classes }}{% endif %}" {%- for attribute, value in params.attributes %} {{attribute}}="{{value}}"{% endfor %} data-module="tabs">
   <h2 class="govuk-tabs__title">
     {{ params.title | default ("Contents") }}
   </h2>
-
   {% if(params.items) %}
   <ul class="govuk-tabs__list">
     {% for item in params.items %}
@@ -20,7 +19,6 @@
     {% endfor %}
   </ul>
   {% endif %}
-
   {% for item in params.items %}
   {% set id = item.id if item.id else idPrefix + "-" + loop.index %}
   <section class="govuk-tabs__panel{% if loop.index > 1 %} govuk-tabs__panel--hidden{% endif %}" id="{{ id }}"{% for attribute, value in item.panel.attributes %} {{attribute}}="{{value}}"{% endfor %}>