SA1503 code fix indents incorrectly with custom indentation size

[bjornhellander]

Consider the following file:

namespace TestNamespace
{
 public class TestClass
 {
  public void TestMethod(int i)
  {
   if (i == 0)
    return;
  }
 }
}

If this is included in a project with settings.indentation.indentationSize=1, then the code fix for SA1503 provides the following incorrect fix:

namespace TestNamespace
{
 internal class TestClass
 {
  public void TestMethod(int i)
  {
   if (i == 0)
            {
                return;
            }
        }
 }
}

StyleCop.Analyzers 1.2.0-beta.435.
Visual Studio 17.4 (Roslyn 4.4.0). Does not happen in earlier versions.
dotnet/roslyn#63013 filed on earlier preview version of Roslyn, but the same applies for 4.4.0.
PR #3580, created to bump Roslyn version to 4.4.0 in the c#11 test project, fails because of the same problem.