Use \&\& instead of and

Author: jvazquez-r7

modules/post/windows/gather/enum_muicache.rb

@@ -107,7 +107,7 @@ def enumerate_muicache(muicache_reg_keys, sys_users, sys_paths, muicache, hive_f
         # the content collected from there.
         print_status("User #{user}: Enumerating registry..")
         subkeys.each do |key|
-          if key[0] != "@" and key != "LangID" and not key.nil?
+          if key[0] != "@" && key != "LangID" && !key.nil?
             result = check_file_exists(key, user)
             results << result unless result.nil?
           end
@@ -188,7 +188,7 @@ def hive_parser(local_hive_copy, muicache, user)
 
     muicache_key_values.each do |value|
       key = value.name
-      if key[0] != "@" and key != "LangID" and not key.nil?
+      if key[0] != "@" && key != "LangID" && !key.nil?
         result = check_file_exists(key, user)
         results << result unless result.nil?
       end