diff --git a/nbconvert/exporters/templateexporter.py b/nbconvert/exporters/templateexporter.py
index 0b8c27f41..da932a507 100644
--- a/nbconvert/exporters/templateexporter.py
+++ b/nbconvert/exporters/templateexporter.py
@@ -685,5 +685,3 @@ def _init_resources(self, resources):
 
     def include_tableofcontents(self):
         return True
-        
-        
diff --git a/share/templates/lab/index.html.j2 b/share/templates/lab/index.html.j2
index f19f0defc..0d8b271eb 100644
--- a/share/templates/lab/index.html.j2
+++ b/share/templates/lab/index.html.j2
@@ -130,7 +130,7 @@ a.anchor-link {
 {%- set (level, text) = item -%}
 {%- if level==1 -%}
 <h1>{{text}}</h1>
-{%- endif -%} 
+{%- endif -%}
 {%- if level==2 -%}
 <h2>{{text}}</h2>
 {%- endif -%}
diff --git a/share/templates/lab/static/index.css b/share/templates/lab/static/index.css
index 6150afe16..620c27de6 100644
--- a/share/templates/lab/static/index.css
+++ b/share/templates/lab/static/index.css
@@ -6801,4 +6801,3 @@ div.jp-Cell-Placeholder-content-2 {
 div.jp-Cell-Placeholder-content-3 {
   top: 140px;
 }
-