Add cancellation checks

src/Formatting.Analyzers/CSharp/FixFormattingOfBinaryExpressionChainAnalyzer.cs

@@ -57,6 +57,8 @@ private static void AnalyzeBinaryExpression(SyntaxNodeAnalysisContext context)
 
             while (true)
             {
+                context.CancellationToken.ThrowIfCancellationRequested();
+
                 ExpressionSyntax left = binaryExpression.Left;
                 SyntaxToken token = binaryExpression.OperatorToken;
 

src/Formatting.Analyzers/CSharp/FixFormattingOfCallChainAnalyzer.cs

@@ -53,6 +53,8 @@ private static void AnalyzeExpression(SyntaxNodeAnalysisContext context)
 
             do
             {
+                context.CancellationToken.ThrowIfCancellationRequested();
+
                 SyntaxKind kind = en.Current.Kind();
 
                 if (kind == SyntaxKind.SimpleMemberAccessExpression)

src/Formatting.Analyzers/CSharp/FixFormattingOfListAnalyzer.cs

@@ -170,6 +170,8 @@ private static void Analyze<TNode>(
 
                 for (int i = nodes.Count - 1; i >= 0; i--)
                 {
+                    context.CancellationToken.ThrowIfCancellationRequested();
+
                     SyntaxTriviaList trailing = (i == 0)
                         ? openNodeOrToken.GetTrailingTrivia()
                         : nodes.GetSeparator(i - 1).TrailingTrivia;