Fixed linter warnings

packages/jael/jael/lib/src/formatter.dart

@@ -66,7 +66,9 @@ class JaelFormatter {
       {bool isFirst = false, bool isLast = false}) {
     if (child == null) {
       return lineLength;
-    } else if (child is Element) return _formatElement(child, lineLength);
+    } else if (child is Element) {
+      return _formatElement(child, lineLength);
+    }
     String s;
     if (child is Interpolation) {
       var b = StringBuffer('{{');

packages/jael/jael/lib/src/renderer.dart

@@ -16,14 +16,18 @@ Document? parseDocument(String text,
 
   if (scanner.errors.isNotEmpty && onError != null) {
     scanner.errors.forEach(onError);
-  } else if (scanner.errors.isNotEmpty) throw scanner.errors.first;
+  } else if (scanner.errors.isNotEmpty) {
+    throw scanner.errors.first;
+  }
 
   var parser = Parser(scanner, asDSX: asDSX);
   var doc = parser.parseDocument();
 
   if (parser.errors.isNotEmpty && onError != null) {
     parser.errors.forEach(onError);
-  } else if (parser.errors.isNotEmpty) throw parser.errors.first;
+  } else if (parser.errors.isNotEmpty) {
+    throw parser.errors.first;
+  }
 
   return doc;
 }

packages/static/test/cache_test.dart

@@ -46,7 +46,7 @@ void main() {
   });
 
   test('sets etag, cache-control, expires, last-modified', () async {
-    var response = await client.get(Uri.parse('$url'));
+    var response = await client.get(Uri.parse(url));
 
     print('Response status: ${response.statusCode}');
     print('Response body: ${response.body}');
@@ -60,7 +60,7 @@ void main() {
   });
 
   test('if-modified-since', () async {
-    var response = await client.get(Uri.parse('$url'), headers: {
+    var response = await client.get(Uri.parse(url), headers: {
       'if-modified-since':
           HttpDate.format(DateTime.now().add(Duration(days: 365)))
     });

packages/validate/lib/src/context_aware.dart

@@ -11,7 +11,9 @@ ContextAwareMatcher predicateWithContext(
 ContextAwareMatcher wrapContextAwareMatcher(x) {
   if (x is ContextAwareMatcher) {
     return x;
-  } else if (x is Matcher) return _WrappedContextAwareMatcher(x);
+  } else if (x is Matcher) {
+    return _WrappedContextAwareMatcher(x);
+  }
   return wrapContextAwareMatcher(wrapMatcher(x));
 }