Make single letter variables more verbose

app/scripts/keyring-controller.js

@@ -508,7 +508,7 @@ module.exports = class KeyringController extends EventEmitter {
     if (typeof password === 'string') {
       this.password = password
     }
-    return Promise.all(this.keyrings.map((keyring, i) => {
+    return Promise.all(this.keyrings.map((keyring) => {
       return Promise.all([keyring.type, keyring.serialize()])
       .then((serializedKeyringArray) => {
         // Label the output values on each serialized Keyring:

app/scripts/keyrings/simple.js

@@ -20,10 +20,10 @@ class SimpleKeyring extends EventEmitter {
   }
 
   deserialize (privateKeys = []) {
-    this.wallets = privateKeys.map((w) => {
-      const stripped = ethUtil.stripHexPrefix(w)
-      const b = new Buffer(stripped, 'hex')
-      const wallet = Wallet.fromPrivateKey(b)
+    this.wallets = privateKeys.map((privateKey) => {
+      const stripped = ethUtil.stripHexPrefix(privateKey)
+      const buffer = new Buffer(stripped, 'hex')
+      const wallet = Wallet.fromPrivateKey(buffer)
       return wallet
     })
     return Promise.resolve()