Remove empty line in the help message

Author: Juhyung Park

README.md

@@ -20,7 +20,6 @@ A command line CodeChain key management tool
     create   : Create new key with passphrase
     delete   : Delete the key of the given address
 
-
   Examples:
 
     cckey create -t platform --passphrase "my password"

src/index.ts

@@ -24,7 +24,6 @@ commander.on("--help", () => {
     getKeys  : Get all saved addresses
     create   : Create new key with passphrase
     delete   : Delete the key of the given address
-
     `);
 
     console.log(`  Examples:
@@ -34,7 +33,6 @@ commander.on("--help", () => {
     cckey getKeys -t asset
 
     cckey delete -t platform --address "tcc..."
-
 `);
 });