remove redundant indent

accounts-db/src/ancient_append_vecs.rs

@@ -3,7 +3,7 @@
 //! 1. a slot that is older than an epoch old
 //! 2. multiple 'slots' squashed into a single older (ie. ancient) slot for convenience and performance
 //!
-//!    Otherwise, an ancient append vec is the same as any other append vec
+//! Otherwise, an ancient append vec is the same as any other append vec
 use {
     crate::{
         account_storage::ShrinkInProgress,