Update file name.

src/Features/Core/Portable/Features.csproj

@@ -121,7 +121,7 @@
     <Compile Include="Remote\RemoteArguments.cs" />
     <Compile Include="Structure\BlockStructureOptions.cs" />
     <Compile Include="AddImport\CodeActions\SymbolReference.SymbolReferenceCodeAction.cs" />
-    <Compile Include="UseCoalesceExpression\AbstractUseCoalesceExpressionCodeFixProvider.cs" />
+    <Compile Include="UseCoalesceExpression\UseCoalesceExpressionCodeFixProvider.cs" />
     <Compile Include="UseCoalesceExpression\AbstractUseCoalesceExpressionDiagnosticAnalyzer.cs" />
     <Compile Include="UseThrowExpression\AbstractUseThrowExpressionDiagnosticAnalyzer.cs" />
     <Compile Include="UseThrowExpression\UseThrowExpressionCodeFixProvider.cs" />