fix typos (#291)

polkadot/erasure-coding/src/lib.rs

@@ -21,7 +21,7 @@
 //! and constructing a merkle root of the data.
 //!
 //! Each of n validators stores their piece of data. We assume n=3f+k, k < 3.
-//! f is the maximum number of faulty vaildators in the system.
+//! 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.
 
 use parity_codec::{Encode, Decode};
@@ -264,7 +264,7 @@ pub fn branches<'a>(chunks: Vec<&'a [u8]>) -> Branches<'a> {
 	}
 }
 
-/// Verify a markle branch, yielding the chunk hash meant to be present at that
+/// Verify a merkle branch, yielding the chunk hash meant to be present at that
 /// index.
 pub fn branch_hash(root: &H256, branch_nodes: &[Vec<u8>], index: usize) -> Result<H256, Error> {
 	let mut trie_storage: MemoryDB<Blake2Hasher> = MemoryDB::default();

polkadot/primitives/src/lib.rs

@@ -53,7 +53,7 @@ pub type AccountId = <Signature as Verify>::Signer;
 /// never know...
 pub type AccountIndex = u32;
 
-/// Indentifier for a chain. 32-bit should be plenty.
+/// Identifier for a chain. 32-bit should be plenty.
 pub type ChainId = u32;
 
 /// A hash of some data used by the relay chain.

polkadot/runtime/src/claims.rs

@@ -191,7 +191,7 @@ mod tests {
 	use substrate_primitives::{H256, Blake2Hasher};
 	use parity_codec::{Decode, Encode};
 	// The testing primitives are very useful for avoiding having to work with signatures
-	// or public keys. `u64` is used as the `AccountId` and no `Signature`s are requried.
+	// or public keys. `u64` is used as the `AccountId` and no `Signature`s are required.
 	use sr_primitives::{
 		BuildStorage, traits::{BlakeTwo256, IdentityLookup}, testing::{Digest, DigestItem, Header}
 	};

polkadot/statement-table/src/generic.rs

@@ -93,7 +93,7 @@ pub struct SignedStatement<C, D, V, S> {
 /// three possible combinations (unordered)
 #[derive(PartialEq, Eq, Debug, Clone)]
 pub enum ValidityDoubleVote<C, D, S> {
-	/// Implicit vote by issuing and explicity voting validity.
+	/// Implicit vote by issuing and explicitly voting validity.
 	IssuedAndValidity((C, S), (D, S)),
 	/// Implicit vote by issuing and explicitly voting invalidity
 	IssuedAndInvalidity((C, S), (D, S)),