Normalize spelling.
@@ -206,7 +206,7 @@ protected OutputStream getStream() throws IOException
/**
* Switches the underlying output stream from a memory based stream to one
- * that is backed by disk. This is the point at which we realise that too
+ * that is backed by disk. This is the point at which we realize that too
* much data is being written to keep in memory, so we elect to switch to
* disk-based storage.
*
