Fix typo.

src/EditorFeatures/CSharpTest/Structure/StringLiteralExpressionStructureTests.cs

@@ -12,7 +12,7 @@ namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.Structure
     public class StringLiteralExpressionStructureTests : AbstractCSharpSyntaxNodeStructureTests<LiteralExpressionSyntax>
     {
         internal override AbstractSyntaxStructureProvider CreateProvider()
-            => new StringLiteralExpressoinStructureProvider();
+            => new StringLiteralExpressionStructureProvider();
 
         [Fact, Trait(Traits.Feature, Traits.Features.Outlining)]
         public async Task TestMultiLineStringLiteral()

src/Features/CSharp/Portable/Structure/CSharpBlockStructureProvider.cs

@@ -41,7 +41,7 @@ internal class CSharpBlockStructureProvider : AbstractBlockStructureProvider
             builder.Add<SimpleLambdaExpressionSyntax, SimpleLambdaExpressionStructureProvider>();
             builder.Add<StructDeclarationSyntax, TypeDeclarationStructureProvider, MetadataAsSource.MetadataTypeDeclarationStructureProvider>();
             builder.Add<SwitchStatementSyntax, SwitchStatementStructureProvider>();
-            builder.Add<LiteralExpressionSyntax, StringLiteralExpressoinStructureProvider>();
+            builder.Add<LiteralExpressionSyntax, StringLiteralExpressionStructureProvider>();
 
             return builder.ToImmutable();
         }

src/Features/CSharp/Portable/Structure/Providers/StringLiteralExpressoinStructureProvider.cs → src/Features/CSharp/Portable/Structure/Providers/StringLiteralExpressionStructureProvider.cs

@@ -8,7 +8,7 @@
 
 namespace Microsoft.CodeAnalysis.CSharp.Structure
 {
-    internal sealed class StringLiteralExpressoinStructureProvider : AbstractSyntaxNodeStructureProvider<LiteralExpressionSyntax>
+    internal sealed class StringLiteralExpressionStructureProvider : AbstractSyntaxNodeStructureProvider<LiteralExpressionSyntax>
     {
         protected override void CollectBlockSpans(LiteralExpressionSyntax node, ArrayBuilder<BlockSpan> spans, OptionSet options, CancellationToken cancellationToken)
         {