incorporate review comments

Author: Bertk

src/coverlet.console/Program.cs

@@ -37,7 +37,7 @@ static int Main(string[] args)
             new Option<string>(new[] { "--targetargs", "-a" }, "Arguments to be passed to the test runner."){Arity = ArgumentArity.ZeroOrOne},
             new Option<string>(new[] { "--output", "-o" }, "Output of the generated coverage report"){Arity = ArgumentArity.ZeroOrOne},
             new Option<LogLevel>(new[] { "--verbosity", "-v" }, () => LogLevel.Normal, "Sets the verbosity level of the command. Allowed values are quiet, minimal, normal, detailed."){Arity = ArgumentArity.ZeroOrOne},
-            new Option<string[]>(new[] { "--formats", "-f" }, () => new[] {"json"} , "Format of the generated coverage report."){Arity = ArgumentArity.ZeroOrMore},
+            new Option<string[]>(new[] { "--format", "-f" }, () => new[] {"json"} , "Format of the generated coverage report."){Arity = ArgumentArity.ZeroOrMore},
             new Option<string>("--threshold", "Exits with error if the coverage % is below value."){Arity = ArgumentArity.ZeroOrOne},
             new Option<List<string>>("--threshold-type", () => new List<string>(new string[] { "line", "branch", "method" }), "Coverage type to apply the threshold to.") {Arity = ArgumentArity.ZeroOrMore},
             new Option<ThresholdStatistic>("--threshold-stat", () => ThresholdStatistic.Minimum, "Coverage statistic used to enforce the threshold value."){Arity = ArgumentArity.ZeroOrMore},
@@ -63,7 +63,7 @@ private static Task<int> HandleCommand(string path,
                                                                string targetargs,
                                                                string output,
                                                                LogLevel verbosity,
-                                                               string[] formats,
+                                                               string[] format,
                                                                string threshold,
                                                                List<string> thresholdType,
                                                                ThresholdStatistic thresholdStat,
@@ -175,12 +175,12 @@ string excludeAssembliesWithoutSources
                     Directory.CreateDirectory(directory);
                 }
 
-                foreach (string fmt in formats)
+                foreach (string fmt in format)
                 {
                     Core.Abstractions.IReporter reporter = new ReporterFactory(fmt).CreateReporter();
                     if (reporter == null)
                     {
-                        throw new Exception($"Specified output format '{formats}' is not supported");
+                        throw new Exception($"Specified output format '{fmt}' is not supported");
                     }
 
                     if (reporter.OutputType == ReporterOutputType.Console)