diff -u b/core/modules/system/templates/links.html.twig b/core/modules/system/templates/links.html.twig
--- b/core/modules/system/templates/links.html.twig
+++ b/core/modules/system/templates/links.html.twig
@@ -38,20 +38,20 @@
-    {% if heading.level %}
+    {%- if heading.level -%}
       <{{ heading.level }}{{ heading.attributes }}>{{ heading.text }}</{{ heading.level }}>
-    {% else %}
+    {%- else -%}
       <h2{{ heading.attributes }}>{{ heading.text }}</h2>
-    {% endif %}
-  {% endif %}
+    {%- endif -%}
+  {%- endif -%}
   <ul{{ attributes }}>
-    {% for item in links %}
+    {%- for item in links -%}
       <li{{ item.attributes }}>
-        {% if item.link %}
+        {%- if item.link -%}
           {{ item.link }}
-        {% elseif item.text_attributes %}
+        {%- elseif item.text_attributes -%}
           <span{{ item.text_attributes }}>{{ item.text }}</span>
-        {% else %}
-          {{ item.text }}
-        {% endif %}
+        {%- else -%}
+          {{- item.text -}}
+        {%- endif -%}
       </li>
     {%- endfor -%}
   </ul>
-{%- endif %}
+{%- endif -%}
diff -u b/core/themes/classy/templates/navigation/links.html.twig b/core/themes/classy/templates/navigation/links.html.twig
--- b/core/themes/classy/templates/navigation/links.html.twig
+++ b/core/themes/classy/templates/navigation/links.html.twig
@@ -36,20 +36,20 @@
-    {% if heading.level %}
-      <{{ heading.level }}{{ heading.attributes }}>{{ heading.text }}</{{ heading.level }}>
-    {% else %}
-      <h2{{ heading.attributes }}>{{ heading.text }}</h2>
-    {% endif %}
-  {% endif %}
+    {%- if heading.level -%}
+      <{{ heading.level }}{{ heading.attributes }}>{{- heading.text }}</{{ heading.level }}>
+    {%- else -%}
+      <h2{{ heading.attributes }}>{{- heading.text }}</h2>
+    {%- endif -%}
+  {%- endif -%}
   <ul{{ attributes }}>
-    {% for item in links %}
+    {%- for item in links -%}
       <li{{ item.attributes }}>
-        {% if item.link %}
+        {%- if item.link -%}
           {{ item.link }}
-        {% elseif item.text_attributes %}
-          <span{{ item.text_attributes }}>{{ item.text }}</span>
-        {% else %}
-          {{ item.text }}
-        {% endif %}
+        {%- elseif item.text_attributes -%}
+          <span{{ item.text_attributes }}>{{- item.text }}</span>
+        {%- else -%}
+          {{- item.text -}}
+        {%- endif -%}
       </li>
-    {% endfor %}
+    {%- endfor -%}
   </ul>
-{%- endif %}
+{%- endif -%}