updating test cases and fixing normal style check

src/Test/L0/Worker/FileCommandTestBase.cs

@@ -242,9 +242,10 @@ namespace GitHub.Runner.Common.Tests.Worker
                     "MY_KEY_6=    <<EOF",
                     "white space test",
                     "EOF",
-                    "MY_KEY_7 << =EOF=",
+                    "MY_KEY_7 <<=EOF=",
                     "abc",
-                    "=EOF="
+                    "=EOF=",
+                    string.Empty
                 };
                 TestUtil.WriteContent(stateFile, content);
                 _fileCmdExtension.ProcessCommand(_executionContext.Object, stateFile, null);