minor improvements (#582)

Author: paul-cheung

src/DotNetty.Buffers/IByteBuffer.cs

@@ -959,7 +959,7 @@ public interface IByteBuffer : IReferenceCounted, IComparable<IByteBuffer>, IEqu
 
         /// <summary>
         ///     Transfers bytes from this buffer's data into the specified destination buffer
-        ///     starting at the curent <see cref="ReaderIndex" /> until the destination becomes
+        ///     starting at the current <see cref="ReaderIndex" /> until the destination becomes
         ///     non-writable and increases the <see cref="ReaderIndex" /> by the number of transferred bytes.
         /// </summary>
         /// <exception cref="IndexOutOfRangeException">

src/DotNetty.Buffers/IPoolChunkListMetric.cs

@@ -7,10 +7,10 @@ namespace DotNetty.Buffers
 
     public interface IPoolChunkListMetric : IEnumerable<IPoolChunkMetric>
     {
-        /// Return the minum usage of the chunk list before which chunks are promoted to the previous list.
+        /// Return the minimum usage of the chunk list before which chunks are promoted to the previous list.
         int MinUsage { get; }
 
-        /// Return the minum usage of the chunk list after which chunks are promoted to the next list.
+        /// Return the maximum usage of the chunk list after which chunks are promoted to the next list.
         int MaxUsage { get; }
     }
 }