Fix linebreaking at the end of links

Fixes #2689

crates/typst-library/src/text/linebreak.rs

@@ -101,7 +101,7 @@ pub(crate) fn breakpoints<'a>(
             let (link, _) = link_prefix(tail);
             let end = last + link.len();
             linebreak_link(link, |i| f(last + i, Breakpoint::Normal));
-            while iter.peek().map_or(false, |&p| p <= end) {
+            while iter.peek().map_or(false, |&p| p < end) {
                 iter.next();
             }
         }
@@ -206,7 +206,20 @@ fn linebreak_link(link: &str, mut f: impl FnMut(usize)) {
     }
 
     let mut offset = 0;
-    let mut emit = |end: usize| {
+    let mut prev = Class::Other;
+
+    for (end, c) in link.char_indices() {
+        let class = Class::of(c);
+
+        // Emit opportunities when going from
+        // - other -> other
+        // - alphabetic -> numeric
+        // - numeric -> alphabetic
+        // Never before after opening delimiters.
+        if end > 0
+            && prev != Class::Open
+            && if class == Class::Other { prev == Class::Other } else { class != prev }
+        {
             let piece = &link[offset..end];
             if piece.len() < 16 {
                 // For bearably long segments, emit them as one.
@@ -220,28 +233,10 @@ fn linebreak_link(link: &str, mut f: impl FnMut(usize)) {
                     f(offset);
                 }
             }
-    };
-
-    let mut prev = Class::Other;
-    for (end, c) in link.char_indices() {
-        let class = Class::of(c);
-
-        // Emit opportunities when going from
-        // - other -> other
-        // - alphabetic -> numeric
-        // - numeric -> alphabetic
-        // Never before after opening delimiters.
-        if end > 0
-            && prev != Class::Open
-            && if class == Class::Other { prev == Class::Other } else { class != prev }
-        {
-            emit(end);
         }
 
         prev = class;
     }
-
-    emit(link.len());
 }
 
 /// Whether hyphenation is enabled at the given offset.

tests/typ/text/linebreak-link.typ

@@ -14,3 +14,10 @@
 Here's a link https://url.com/data/extern12840%data_urlenc and then there are more
 links #link("www.url.com/data/extern12840%data_urlenc") in my text of links
 http://mydataurl/hash/12098541029831025981024980124124214/incremental/progress%linkdata_information_setup_my_link_just_never_stops_going/on?query=false
+
+---
+// Ensure that there's no unconditional break at the end of a link.
+#set page(width: 180pt, height: auto, margin: auto)
+#set text(11pt)
+
+For info see #link("https://myhost.tld").