[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

nbconvert/exporters/templateexporter.py

@@ -685,5 +685,3 @@ def _init_resources(self, resources):
 
     def include_tableofcontents(self):
         return True
-
-

nbconvert/filters/markdown_mistune.py

@@ -485,6 +485,7 @@ def render(self, source: str) -> str:
         """Render the HTML output for a Markdown source."""
         return str(super().__call__(source))
 
+
 def markdown2html_mistune(source: str) -> str:
     """Convert a markdown string to HTML using mistune"""
     return MarkdownWithMath(renderer=IPythonRenderer(escape=False)).render(source)
@@ -500,6 +501,7 @@ def heading(self, text, level):
         self.headings.append((level, text))
         return ""  # We return an empty string to avoid outputting the headings
 
+
 def extract_titles_from_markdown_input(markdown_input):
     # Markdown_input is a single string with all the markdown content concatenated
     # Initiate list of titles
@@ -515,12 +517,15 @@ def extract_titles_from_markdown_input(markdown_input):
     extract_titles(markdown_input)
 
     # Extracted headings
-    for level, title in renderer.headings: # renderer.headings is an array for each markdown element
+    for (
+        level,
+        title,
+    ) in renderer.headings:  # renderer.headings is an array for each markdown element
         children = title["children"]
         attrs = title["attrs"]
         raw_text = children[0]["raw"]
         level = attrs["level"]
-        id = raw_text.replace(' ', '-')
-        href= "#" + id
+        id = raw_text.replace(" ", "-")
+        href = "#" + id
         titles_array.append([level, raw_text, id, href])
     return titles_array

share/templates/lab/index.html.j2

@@ -186,7 +186,7 @@ a.anchor-link {
 {{text}}
 </a>
 </div>
-{%- endif -%} 
+{%- endif -%}
 {%- if level==2 -%}
 <div class="jp-RenderedHTMLCommon jp-RenderedHTMLTOC-Item-h2">
 <a href={{href}}>