Preserve underscores in VariableExpression.toString()

Closes #2180

CHANGELOG.md

@@ -1,3 +1,8 @@
+## 1.71.2
+
+* When printing suggestions for variables, use underscores in variable names
+  when the original usage used underscores.
+
 ## 1.71.1
 
 ### Command-Line Interface

lib/src/ast/sass/expression/variable.dart

@@ -35,5 +35,5 @@ final class VariableExpression implements Expression, SassReference {
   T accept<T>(ExpressionVisitor<T> visitor) =>
       visitor.visitVariableExpression(this);
 
-  String toString() => namespace == null ? '\$$name' : '$namespace.\$$name';
+  String toString() => span.text;
 }

pkg/sass_api/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 9.4.2
+
+* No user-visible changes.
+
 ## 9.4.1
 
 * No user-visible changes.

pkg/sass_api/pubspec.yaml

@@ -2,15 +2,15 @@ name: sass_api
 # Note: Every time we add a new Sass AST node, we need to bump the *major*
 # version because it's a breaking change for anyone who's implementing the
 # visitor interface(s).
-version: 9.4.1
+version: 9.4.2
 description: Additional APIs for Dart Sass.
 homepage: https://github.com/sass/dart-sass
 
 environment:
   sdk: ">=3.0.0 <4.0.0"
 
 dependencies:
-  sass: 1.71.1
+  sass: 1.71.2
 
 dev_dependencies:
   dartdoc: ^6.0.0

pubspec.yaml

@@ -1,5 +1,5 @@
 name: sass
-version: 1.71.1
+version: 1.71.2
 description: A Sass implementation in Dart.
 homepage: https://github.com/sass/dart-sass