Change criteria for generating a table of contents

Count level 3 headings when deciding whether there are enough headings
on a page to justify generating a table of contents. Previously, only
level 1 and 2 headings were being counted.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/generate_html.rs b/src/generate_html.rs
index 806c4bc..a6aa0b6 100644
--- a/src/generate_html.rs
+++ b/src/generate_html.rs
@@ -71,7 +71,7 @@ pub fn get_html_head(page: &Page, website: &Website) -> String {
 
 
 pub fn get_table_of_contents(page: &Page) -> String {
-    if page.headings.iter().filter(|h| h.level != Level::Heading3).count() < 3 {
+    if page.headings.len() < 3 {
         return String::new();
     }
     let mut toc = String::from("<details><summary></summary><ul>\n");