Fix the operator span when parsing a standalone %

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.93.3-dev
+
+* Fix the span reported for standalone `%` expressions followed by whitespace.
+
 ## 1.93.2
 
 * No user-visible changes.

lib/src/parse/stylesheet.dart

@@ -2128,11 +2128,12 @@ abstract class StylesheetParser extends Parser {
           length: operator.operator.length,
         );
       }
+      var operatorEnd = scanner.position;
       whitespace(consumeNewlines: true);
 
       if (operator == BinaryOperator.modulo && !_lookingAtExpression()) {
         addSingleExpression(StringExpression.plain(
-            '%', scanner.spanFromPosition(scanner.position - 1)));
+            '%', scanner.spanFromPosition(operatorEnd - 1, operatorEnd)));
       } else {
         operators.add(operator);
         operands.add(singleExpression);

pubspec.yaml

@@ -1,5 +1,5 @@
 name: sass
-version: 1.93.2
+version: 1.93.3-dev
 description: A Sass implementation in Dart.
 homepage: https://github.com/sass/dart-sass