C#: Extract the ValueText instead of Text for interpolated string literals as this contains the value after eg. indentation processing.

Author: michaelnebel

csharp/extractor/Semmle.Extraction.CSharp/Entities/Expressions/InterpolatedString.cs

@@ -27,7 +27,7 @@ protected override void PopulateExpression(TextWriter trapFile)
                     case SyntaxKind.InterpolatedStringText:
                         // Create a string literal
                         var interpolatedText = (InterpolatedStringTextSyntax)c;
-                        new Expression(new ExpressionInfo(Context, Type, Context.CreateLocation(c.GetLocation()), ExprKind.STRING_LITERAL, this, child++, false, interpolatedText.TextToken.Text));
+                        new Expression(new ExpressionInfo(Context, Type, Context.CreateLocation(c.GetLocation()), ExprKind.STRING_LITERAL, this, child++, false, interpolatedText.TextToken.ValueText));
                         break;
                     default:
                         throw new InternalError(c, $"Unhandled interpolation kind {c.Kind()}");