formatting + cleanup

src/CodeCoverageSummary/GlobalSuppressions.cs

@@ -0,0 +1,8 @@
+// This file is used by Code Analysis to maintain SuppressMessage
+// attributes that are applied to this project.
+// Project-level suppressions either have no target or are given
+// a specific target and scoped to a namespace, type, member, etc.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: SuppressMessage("Performance", "RCS1197:Optimize StringBuilder.Append/AppendLine call.", Scope = "type", Target = "~T:CodeCoverageSummary.Program")]

src/CodeCoverageSummary/Program.cs

@@ -9,8 +9,6 @@ namespace CodeCoverageSummary
 {
     internal static class Program
     {
-        // test file: /Dev/Csharp/CodeCoverageSummary/coverage.cobertura.xml
-
         private static int Main(string[] args)
         {
             return Parser.Default.ParseArguments<CommandLineOptions>(args)
@@ -85,7 +83,7 @@ namespace CodeCoverageSummary
                                          return -3; // unhandled error
                                      }
                                  },
-                                       errs => -1); // invalid arguments
+                                 _ => -1); // invalid arguments
         }
 
         private static CodeSummary ParseTestResults(string filename)