Prevent some empty lines in the excerpt

Author: isoos

app/lib/package/backend.dart

@@ -1346,17 +1346,20 @@ class PackageBackend {
       /// Limit the changelog to 10 lines, 75 characters each:
       final lines = text.split('\n');
       final excerpt = lines
+          // prevent accidental HTML-tag creation
+          .map((line) => line
+              .replaceAll('<', '[')
+              .replaceAll('>', ']')
+              .replaceAll('&', ' ')
+              .trim())
           // filter empty or decorative lines to maximalize usefulness
           .where((line) =>
               line.isNotEmpty &&
+              line != '-' && // empty list item
+              line != '1.' && // empty list item
               !line.startsWith('```') && // also removes the need to escape it
               !line.startsWith('---'))
           .take(10)
-          // prevent accidental HTML-tag creation
-          .map((line) => line
-              .replaceAll('<', '[')
-              .replaceAll('>', ']')
-              .replaceAll('&', ' '))
           .map((line) =>
               line.length < 76 ? line : '${line.substring(0, 70)}[...]')
           .join('\n');