fixed typo in docs

diff --git a/asyncio/async_io.hpp b/asyncio/async_io.hpp
index 1737323..3c2f62a 100644 (file)
--- a/asyncio/async_io.hpp
+++ b/asyncio/async_io.hpp
@@ -190,7 +190,7 @@ class FilterNull : public FilterBase
 /**
  * the base class of the IO classes.
  *
- * provides the functionality to read from a file desriptor and write to a file descriptor (which can be
+ * provides the functionality to read from a file descriptor and write to a file descriptor (which can be
  * identical (like for socket io), but also can be different (like pipes from/to a process)).
  * The data stream can be filtered through plugged filter objects which are building a filter chain.
  * Incoming data is filtered forward through the chain; outgoing data is filtered backward through the chain.