Fix typo

Commit migrated from https://github.com/dotnet/coreclr/commit/31590489ad0cca06094a82268ed542619962db4b

diff --git a/src/libraries/System.Private.CoreLib/src/System/Text/StringBuilder.cs b/src/libraries/System.Private.CoreLib/src/System/Text/StringBuilder.cs
index 0cac07a..25f2a5a 100644 (file)
--- a/src/libraries/System.Private.CoreLib/src/System/Text/StringBuilder.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Text/StringBuilder.cs
@@ -561,7 +561,7 @@ namespace System.Text
         /// EnumerateChunks returns ChunkEnumerable that follows the IEnumerable pattern and
         /// thus can be used in a C# 'foreach' statement.   Thus 
         ///      foreach (ReadOnlyMemory<char> chunk in sb.EnumerateChunks())
-        ///      {  /* opererate on bytes using 'chunk' */   }
+        ///      {  /* operate on bytes using 'chunk' */   }
         ///      
         /// </summary>
         public ChunkEnumerable EnumerateChunks() => new ChunkEnumerable(this);