Create Test, allow for conditional trim

src/Spectre.Console.Cli/ConfiguratorExtensions.cs

@@ -71,6 +71,23 @@ public static class ConfiguratorExtensions
 
         configurator.Settings.StrictParsing = true;
         return configurator;
+    }
+
+    /// <summary>
+    /// Tells the help writer whether or not to trim trailing period.
+    /// </summary>
+    /// <param name="configurator">The configurator.</param>
+    /// <param name="trimTrailingPeriods">True to trim trailing period (default), false to not.</param>
+    /// <returns>A configurator that can be used to configure the application further.</returns>
+    public static IConfigurator TrimTrailingPeriods(this IConfigurator configurator, bool trimTrailingPeriods)
+    {
+        if (configurator == null)
+        {
+            throw new ArgumentNullException(nameof(configurator));
+        }
+
+        configurator.Settings.TrimTrailingPeriod = trimTrailingPeriods;
+        return configurator;
     }
 
     /// <summary>

src/Spectre.Console.Cli/ICommandAppSettings.cs

@@ -34,7 +34,12 @@ public interface ICommandAppSettings
     /// <summary>
     /// Gets or sets case sensitivity.
     /// </summary>
-    CaseSensitivity CaseSensitivity { get; set; }
+    CaseSensitivity CaseSensitivity { get; set; }
+
+    /// <summary>
+    /// Gets or sets a value indicating whether trailing period of a description is trimmed.
+    /// </summary>
+    bool TrimTrailingPeriod { get; set; }
 
     /// <summary>
     /// Gets or sets a value indicating whether or not parsing is strict.

src/Spectre.Console.Cli/Internal/Configuration/CommandAppSettings.cs

@@ -10,13 +10,14 @@ internal sealed class CommandAppSettings : ICommandAppSettings
     public CaseSensitivity CaseSensitivity { get; set; }
     public bool PropagateExceptions { get; set; }
     public bool ValidateExamples { get; set; }
+    public bool TrimTrailingPeriod { get; set; } = true;
     public bool StrictParsing { get; set; }
 
     public ParsingMode ParsingMode =>
         StrictParsing ? ParsingMode.Strict : ParsingMode.Relaxed;
 
-    public Func<Exception, int>? ExceptionHandler { get; set; }
-
+    public Func<Exception, int>? ExceptionHandler { get; set; }
+
     public CommandAppSettings(ITypeRegistrar registrar)
     {
         Registrar = new TypeRegistrar(registrar);

src/Spectre.Console.Cli/Internal/HelpWriter.cs

@@ -373,11 +373,20 @@ internal static class HelpWriter
             {
                 arguments.Style("silver", $"<{argument.Name.EscapeMarkup()}>");
                 arguments.Space();
-            }
+            }
 
-            grid.AddRow(
-                arguments.ToString().TrimEnd(),
-                child.Description ?? " ");
+            if (model.TrimTrailingPeriod)
+            {
+                grid.AddRow(
+                    arguments.ToString().TrimEnd(),
+                    child.Description?.TrimEnd('.') ?? " ");
+            }
+            else
+            {
+                grid.AddRow(
+                    arguments.ToString().TrimEnd(),
+                    child.Description ?? " ");
+            }
         }
 
         result.Add(grid);

src/Spectre.Console.Cli/Internal/Modelling/CommandModel.cs

@@ -6,7 +6,8 @@ internal sealed class CommandModel : ICommandContainer
     public ParsingMode ParsingMode { get; }
     public CommandInfo? DefaultCommand { get; }
     public IList<CommandInfo> Commands { get; }
-    public IList<string[]> Examples { get; }
+    public IList<string[]> Examples { get; }
+    public bool TrimTrailingPeriod { get; }
 
     public CommandModel(
         CommandAppSettings settings,
@@ -16,9 +17,10 @@ internal sealed class CommandModel : ICommandContainer
     {
         ApplicationName = settings.ApplicationName;
         ParsingMode = settings.ParsingMode;
+        TrimTrailingPeriod = settings.TrimTrailingPeriod;
         DefaultCommand = defaultCommand;
         Commands = new List<CommandInfo>(commands ?? Array.Empty<CommandInfo>());
-        Examples = new List<string[]>(examples ?? Array.Empty<string[]>());
+        Examples = new List<string[]>(examples ?? Array.Empty<string[]>());
     }
 
     public string GetApplicationName()