Fix diagnostic print

compiler/NubLang/Syntax/Tokenizer.cs

@@ -90,23 +90,23 @@ public sealed class Tokenizer
         {
             try
             {
-                // Skip whitespace and increment line counter if newline
                 var current = Peek()!.Value;
                 if (char.IsWhiteSpace(current))
                 {
                     if (current is '\n')
                     {
                         _line += 1;
-                        _column = 1;
+                        // note(nub31): Next increments the column, so 0 is correct here
+                        _column = 0;
                     }
 
                     Next();
                     continue;
                 }
 
-                // Skip single line comments but keep newline so next iteration increments the line counter
                 if (current == '/' && Peek(1) == '/')
                 {
+                    // note(nub31): Keep newline so next iteration increments the line counter
                     while (Peek() is not '\n')
                     {
                         Next();