updated from k < 3 to 0 < k <= 3 (#1119)

Co-authored-by: dud1337 <grant@dud.li>

erasure-coding/src/lib.rs

@@ -20,7 +20,7 @@
 //! The way we accomplish this is by erasure coding the data into n pieces
 //! and constructing a merkle root of the data.
 //!
-//! Each of n validators stores their piece of data. We assume n=3f+k, k < 3.
+//! Each of n validators stores their piece of data. We assume n=3f+k, 0 < k ≤ 3.
 //! f is the maximum number of faulty validators in the system.
 //! The data is coded so any f+1 chunks can be used to reconstruct the full data.