Apply suggestions from code review

Co-authored-by: Jimmy Chen <jchen.tc@gmail.com>

book/src/validator-manager.md

@@ -24,7 +24,7 @@ downtime.
 The `validator-manager` boasts the following features:
 
 - One-line command to arbitrarily move validators between two VCs, maintaining the slashing protection database.
-- Generates deposit files compatible with the [Ethereum Staking Launchpad]().
+- Generates deposit files compatible with the [Ethereum Staking Launchpad][].
 - Generally involves zero or very little downtime.
 - The "key cache" is preserved whenever a validator is added with the validator
     manager, preventing long waits at start up when a new validator is added.

validator_client/src/cli.rs

@@ -207,7 +207,6 @@ pub fn cli_app<'a, 'b>() -> App<'a, 'b> {
         .arg(
             Arg::with_name("http-allow-keystore-export")
                 .long("http-allow-keystore-export")
-                .value_name("ORIGIN")
                 .help("If present, allow access to the DELETE /lighthouse/keystores HTTP \
                     API method, which allows exporting keystores and passwords to HTTP API \
                     consumers who have access to the API token. This method is useful for \
@@ -219,7 +218,6 @@ pub fn cli_app<'a, 'b>() -> App<'a, 'b> {
         .arg(
             Arg::with_name("http-store-passwords-in-secrets-dir")
                 .long("http-store-passwords-in-secrets-dir")
-                .value_name("ORIGIN")
                 .help("If present, any validators created via the HTTP will have keystore \
                     passwords stored in the secrets-dir rather than the validator \
                     definitions file.")

validator_manager/src/create_validators.rs

@@ -68,7 +68,7 @@ pub fn cli_app<'a, 'b>() -> App<'a, 'b> {
             Arg::with_name(FIRST_INDEX_FLAG)
                 .long(FIRST_INDEX_FLAG)
                 .value_name("FIRST_INDEX")
-                .help("The first of consecutive key indexes you wish to recover.")
+                .help("The first of consecutive key indexes you wish to create.")
                 .takes_value(true)
                 .required(false)
                 .default_value("0"),