Exclude some ToString() methods from coverage

These are only used for debug information and I'm okayish with them failing at runtime.

CliFx/Domain/CommandDirectiveInput.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 
 namespace CliFx.Domain
 {
@@ -12,6 +13,7 @@ namespace CliFx.Domain
 
         public CommandDirectiveInput(string name) => Name = name;
 
+        [ExcludeFromCodeCoverage]
         public override string ToString() => $"[{Name}]";
     }
 }

CliFx/Domain/CommandInput.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Text;
 using CliFx.Internal.Extensions;
@@ -36,6 +37,7 @@ namespace CliFx.Domain
             Options = options;
         }
 
+        [ExcludeFromCodeCoverage]
         public override string ToString()
         {
             var buffer = new StringBuilder();

CliFx/Domain/CommandOptionInput.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using CliFx.Internal.Extensions;
 
@@ -29,6 +30,7 @@ namespace CliFx.Domain
 
         public string GetRawValues() => Values.Select(v => v.Quote()).JoinToString(" ");
 
+        [ExcludeFromCodeCoverage]
         public override string ToString() => $"{GetRawAlias()} {GetRawValues()}";
     }
 }

CliFx/Domain/CommandOptionSchema.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Reflection;
 using System.Text;
@@ -75,6 +76,7 @@ namespace CliFx.Domain
 
         public string GetInternalDisplayString() => $"{Property?.Name ?? "<implicit>"} ('{GetUserFacingDisplayString()}')";
 
+        [ExcludeFromCodeCoverage]
         public override string ToString() => GetInternalDisplayString();
     }
 

CliFx/Domain/CommandParameterInput.cs

@@ -1,4 +1,6 @@
-namespace CliFx.Domain
+using System.Diagnostics.CodeAnalysis;
+
+namespace CliFx.Domain
 {
     internal class CommandParameterInput
     {
@@ -6,6 +8,7 @@
 
         public CommandParameterInput(string value) => Value = value;
 
+        [ExcludeFromCodeCoverage]
         public override string ToString() => Value;
     }
 }

CliFx/Domain/CommandParameterSchema.cs

@@ -1,4 +1,5 @@
-using System.Reflection;
+using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
 using System.Text;
 using CliFx.Attributes;
 
@@ -31,6 +32,7 @@ namespace CliFx.Domain
 
         public string GetInternalDisplayString() => $"{Property?.Name ?? "<implicit>"} ([{Order}] {GetUserFacingDisplayString()})";
 
+        [ExcludeFromCodeCoverage]
         public override string ToString() => GetInternalDisplayString();
     }
 

CliFx/Domain/CommandSchema.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Linq;
 using System.Reflection;
@@ -207,6 +208,7 @@ namespace CliFx.Domain
             return buffer.ToString();
         }
 
+        [ExcludeFromCodeCoverage]
         public override string ToString() => GetInternalDisplayString();
     }