AddDisplayStringLineIndented also needs to do output chaining

Summary: Addition of this method was missing the required output chaining, causing missing lines in the human-readable log when both JSON and text output are used in noninteractive runs.

Differential Revision: D54494184

fbshipit-source-id: d0cf499b90fe2008b06f621affe9f6c893e0e8cf

CommandInfrastructure/JsonStructuredOutput.cs

@@ -115,6 +115,7 @@ public void AddDisplayStringLineIndented(int indent, string format, params objec
                 // Do not interpret format string.
                 CurrentDisplayString?.AppendLine(format);
             }
+            m_chainedStructuredOutput?.AddDisplayStringLineIndented(indent, format, args);
         }
 
         public void BeginArray(string key)