spelling: during

Author: jsoref

src/rabbit_msg_store_index.erl

@@ -59,7 +59,7 @@
 
 %% Update an entry in the index.
 %% Is called by a msg_store process only.
-%% The function is called duting message store recovery after crash.
+%% The function is called during message store recovery after crash.
 %% The difference between update and insert functions, is that update
 %% should not fail if entry already exist, and should be atomic.
 -callback update(msg_location(), index_state()) -> 'ok'.