disable multiline format on at least one closing tag not found

src/app/browser/window/tab/item/page/content/text/gemini.rs

@@ -14,7 +14,7 @@ use tag::Tag;
 use super::{ItemAction, WindowAction};
 use crate::app::browser::window::action::Position;
 use ggemtext::line::{
-    code::{Inline, Multiline},
+    code::*,
     header::{Header, Level},
     link::Link,
     list::List,
@@ -103,6 +103,19 @@ impl Gemini {
         // Init gutter widget (the tooltip on URL tags hover)
         let gutter = Gutter::build(&text_view);
 
+        // Disable multiline format on at least one closing tag not found
+        let is_multiline_enabled = {
+            let mut m = Vec::new();
+            for (i, l) in gemtext.lines().enumerate() {
+                if (l.starts_with(multiline::TAG) || l.ends_with(multiline::TAG))
+                    && Inline::from(l).is_none()
+                {
+                    m.push(i);
+                }
+            }
+            m.len() % 2 == 0
+        };
+
         // Parse gemtext lines
         for line in gemtext.lines() {
             // Is inline code
@@ -144,6 +157,7 @@ impl Gemini {
             }
 
             // Is multiline code
+            if is_multiline_enabled {
                 match multiline {
                     None => {
                         // Open tag found
@@ -223,7 +237,8 @@ impl Gemini {
                             Err(e) => return Err(Error::Gemtext(e.to_string())),
                         }
                     }
-            };
+                }
+            }
 
             // Is header
             if let Some(header) = Header::from(line) {