Address most of rubocop's nits

lib/metasploit/framework/aws/client.rb

@@ -6,6 +6,7 @@ module Metasploit
       module Client
         USER_AGENT = "aws-sdk-ruby2/2.6.27 ruby/2.3.2 x86_64-darwin15"
         include Msf::Exploit::Remote::HttpClient
+
         # because Post modules require these to be defined when including HttpClient
         def register_autofilter_ports(ports=[]); end
         def register_autofilter_hosts(ports=[]); end
@@ -77,7 +78,7 @@ module Metasploit
         def body(vars_post)
           pstr = ""
           vars_post.each_pair do |var, val|
-            pstr << '&' if pstr.length > 0
+            pstr << '&' unless pstr.empty?
             pstr << var
             pstr << '='
             pstr << val

modules/post/multi/escalate/aws_create_iam_user.rb

@@ -1,3 +1,8 @@
+##
+# This module requires Metasploit: http://metasploit.com/download
+# Current source: https://github.com/rapid7/metasploit-framework
+##
+
 require 'msf/core'
 require 'metasploit/framework/aws/client'
 
@@ -6,7 +11,9 @@ class MetasploitModule < Msf::Post
   include Metasploit::Framework::Aws::Client
 
   def initialize(info = {})
-    super(update_info(info,
+    super(
+      update_info(
+        info,
         'Name'           => "Create an AWS IAM User",
         'Description'    => %q{
           This module will attempt to create an AWS (Amazon Web Services) IAM
@@ -19,12 +26,14 @@ class MetasploitModule < Msf::Post
         'References'     => [
           [ 'URL', 'https://github.com/devsecops/bootcamp/raw/master/Week-6/slides/june-DSO-bootcamp-week-six-lesson-three.pdf' ]
         ]
-    ))
+      )
+    )
 
     register_options(
       [
         OptString.new('IAM_USERNAME', [false, 'Name of the user to be created (leave empty or unset to use a random name)', ''])
-      ])
+      ]
+    )
     register_advanced_options(
       [
         OptString.new('METADATA_IP', [true, 'The metadata service IP', '169.254.169.254']),
@@ -36,11 +45,11 @@ class MetasploitModule < Msf::Post
         OptString.new('SSL', [true, 'AWS IAM Endpoint SSL', true]),
         OptString.new('IAM_GROUP_POL', [true, 'IAM group policy to use', '{"Version": "2012-10-17", "Statement": [{"Effect": "Allow", "Action": "*", "Resource": "*" }]}']),
         OptString.new('Region', [true, 'The default region', 'us-east-1' ])
-      ])
+      ]
+    )
     deregister_options('VHOST')
   end
 
-
   def run
     # setup creds for making IAM API calls
     creds = metadata_creds
@@ -119,4 +128,3 @@ class MetasploitModule < Msf::Post
     {}
   end
 end
-