Fixed parsing errors when the first argument is on a new line

src/Discord.Net.Commands/Map/CommandMap.cs

@@ -6,6 +6,8 @@ namespace Discord.Commands
 {
     internal class CommandMap
     {
+        static readonly char[] _whitespaceChars = new char[] { ' ', '\r', '\n' };
+
         private readonly ConcurrentDictionary<string, CommandMapNode> _nodes;
 
         public CommandMap()
@@ -16,15 +18,16 @@ namespace Discord.Commands
         public void AddCommand(Command command)
         {
             string text = command.Text;
-            int nextSpace = text.IndexOf(' ');
+            int nextSpace = NextWhitespace(text);
             string name;
 
+            if (nextSpace == -1)
+                name = command.Text;
+            else
+                name = command.Text.Substring(0, nextSpace);
+
             lock (this)
             {
-                if (nextSpace == -1)
-                    name = command.Text;
-                else
-                    name = command.Text.Substring(0, nextSpace);
                 var nextNode = _nodes.GetOrAdd(name, x => new CommandMapNode(x));
                 nextNode.AddCommand(nextSpace == -1 ? "" : text, nextSpace + 1, command);
             }
@@ -32,16 +35,16 @@ namespace Discord.Commands
         public void RemoveCommand(Command command)
         {
             string text = command.Text;
-            int nextSpace = text.IndexOf(' ');
+            int nextSpace = NextWhitespace(text);
             string name;
 
+            if (nextSpace == -1)
+                name = command.Text;
+            else
+                name = command.Text.Substring(0, nextSpace);
+
             lock (this)
             {
-                if (nextSpace == -1)
-                    name = command.Text;
-                else
-                    name = command.Text.Substring(0, nextSpace);
-
                 CommandMapNode nextNode;
                 if (_nodes.TryGetValue(name, out nextNode))
                 {
@@ -54,16 +57,16 @@ namespace Discord.Commands
 
         public IEnumerable<Command> GetCommands(string text)
         {
-            int nextSpace = text.IndexOf(' ');
+            int nextSpace = NextWhitespace(text);
             string name;
 
+            if (nextSpace == -1)
+                name = text;
+            else
+                name = text.Substring(0, nextSpace);
+
             lock (this)
             {
-                if (nextSpace == -1)
-                    name = text;
-                else
-                    name = text.Substring(0, nextSpace);
-
                 CommandMapNode nextNode;
                 if (_nodes.TryGetValue(name, out nextNode))
                     return nextNode.GetCommands(text, nextSpace + 1);
@@ -71,5 +74,17 @@ namespace Discord.Commands
                     return Enumerable.Empty<Command>();
             }
         }
+
+        private static int NextWhitespace(string text)
+        {
+            int lowest = int.MaxValue;
+            for (int i = 0; i < _whitespaceChars.Length; i++)
+            {
+                int index = text.IndexOf(_whitespaceChars[i]);
+                if (index != -1 && index < lowest)
+                    lowest = index;
+            }
+            return (lowest != int.MaxValue) ? lowest : -1;
+        }
     }
 }