Do not truncate command table

Temporary fix for commands not showing up if they
are missing a description. This is really a bug in the table
rendering and should be fixed there at some point.

Closes #192

src/Spectre.Console.Testing/Spectre.Console.Testing.v3.ncrunchproject

@@ -0,0 +1,5 @@
+<ProjectConfiguration>
+  <Settings>
+    <XUnit2Enabled>False</XUnit2Enabled>
+  </Settings>
+</ProjectConfiguration>

src/Spectre.Console.Tests/Data/Commands/NoDescriptionCommand.cs

@@ -0,0 +1,16 @@
+using System.Diagnostics.CodeAnalysis;
+using Spectre.Console.Cli;
+
+namespace Spectre.Console.Tests.Data
+{
+    public sealed class NoDescriptionCommand : Command<EmptyCommandSettings>
+    {
+        [CommandOption("-f|--foo <VALUE>")]
+        public int Foo { get; set; }
+
+        public override int Execute([NotNull] CommandContext context, [NotNull] EmptyCommandSettings settings)
+        {
+            return 0;
+        }
+    }
+}

src/Spectre.Console.Tests/Expectations/CommandAppTests.Help.Help.Should_Not_Show_Truncated_Command_Table_If_Commands_Are_Missing_Description.verified.txt

@@ -0,0 +1,9 @@
+USAGE:
+    myapp [OPTIONS] <COMMAND>
+
+OPTIONS:
+    -h, --help       Prints help information
+    -v, --version    Prints version information
+
+COMMANDS:
+    bar

src/Spectre.Console.Tests/Unit/Cli/CommandAppTests.Help.cs

@@ -226,6 +226,24 @@ namespace Spectre.Console.Tests.Unit.Cli
                 // Then
                 return Verifier.Verify(output);
             }
+
+            [Fact]
+            public Task Should_Not_Show_Truncated_Command_Table_If_Commands_Are_Missing_Description()
+            {
+                // Given
+                var fixture = new CommandAppFixture();
+                fixture.Configure(configurator =>
+                {
+                    configurator.SetApplicationName("myapp");
+                    configurator.AddCommand<NoDescriptionCommand>("bar");
+                });
+
+                // When
+                var (_, output, _, _) = fixture.Run("--help");
+
+                // Then
+                return Verifier.Verify(output);
+            }
         }
     }
 }

src/Spectre.Console.v3.ncrunchsolution

@@ -0,0 +1,6 @@
+<SolutionConfiguration>
+  <Settings>
+    <AllowParallelTestExecution>True</AllowParallelTestExecution>
+    <SolutionConfigured>True</SolutionConfigured>
+  </Settings>
+</SolutionConfiguration>

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

@@ -244,13 +244,13 @@ namespace Spectre.Console.Cli.Internal
                 {
                     grid.AddRow(
                         $"[silver]<{argument.Name.EscapeMarkup()}>[/]",
-                        argument.Description?.TrimEnd('.') ?? string.Empty);
+                        argument.Description?.TrimEnd('.') ?? " ");
                 }
                 else
                 {
                     grid.AddRow(
                         $"[grey][[{argument.Name.EscapeMarkup()}]][/]",
-                        argument.Description?.TrimEnd('.') ?? string.Empty);
+                        argument.Description?.TrimEnd('.') ?? " ");
                 }
             }
 
@@ -324,7 +324,7 @@ namespace Spectre.Console.Cli.Internal
             {
                 grid.AddRow(
                     GetOptionParts(option),
-                    option.Description?.TrimEnd('.') ?? string.Empty);
+                    option.Description?.TrimEnd('.') ?? " ");
             }
 
             grid.AddEmptyRow();
@@ -370,7 +370,7 @@ namespace Spectre.Console.Cli.Internal
 
                 grid.AddRow(
                     arguments.ToString().TrimEnd(),
-                    child.Description?.TrimEnd('.') ?? string.Empty);
+                    child.Description?.TrimEnd('.') ?? " ");
             }
 
             grid.AddEmptyRow();