adjust spaces and review comments for persistence lib

Author: h00die

lib/msf/core/exploit/local/persistence.rb

@@ -4,7 +4,7 @@ module Msf
   module Exploit::Local::Persistence
     def initialize(info = {})
       @persistence_service = Rex::Sync::Event.new(auto_reset=false)
-      @clean_up_rc = ''
+      @clean_up_rc = nil
       super(
         update_info(
           info,
@@ -17,7 +17,7 @@ def initialize(info = {})
 
       register_advanced_options(
         [
-          OptString.new('WritableDir', [true, 'A directory where we can write files', '/tmp/']),
+          OptString.new('WritableDir', [true, 'A directory where we can write files', '']),
           OptBool.new('CleanUpRc', [true, 'Create a cleanup resource file.', true])
         ]
       )

lib/msf/core/exploit/local/timespec.rb

@@ -4,14 +4,14 @@ module Msf
   module Exploit::Local::Timespec
     TIMESPEC_REGEX = %r{
     \b(
-      (?:[01]?\d|2[0-3]):[0-5]\d(?:\s?(?:AM|PM))? |          # Matches HH:MM (12h/24h)
-      midnight | noon | teatime | now |                      # Matches special keywords
-      now\s?\+\s?\d+\s?(?:minutes?|hours?|days?|weeks?) |    # Matches relative times
-      (?:mon|tue|wed|thu|fri|sat|sun)(?:day)? |             # Matches named days
+      (?:[01]?\d|2[0-3]):[0-5]\d(?:\s?(?:AM|PM))? |            # Matches HH:MM (12h/24h)
+      midnight | noon | teatime | now |                        # Matches special keywords
+      now\s?\+\s?\d+\s?(?:minutes?|hours?|days?|weeks?) |      # Matches relative times
+      (?:mon|tue|wed|thu|fri|sat|sun)(?:day)? |                # Matches named days
       (?:next|last)\s(?:mon|tue|wed|thu|fri|sat|sun)(?:day)? | # Matches next/last weekday
-      \d{1,2}/\d{1,2}/\d{2,4} |                           # Matches MM/DD/YY(YY)
-      \d{1,2}\.\d{1,2}\.\d{2,4} |                           # Matches DD.MM.YY(YY)
-      \d{6} | \d{8}                                         # Matches MMDDYY or MMDDYYYY
+      \d{1,2}/\d{1,2}/\d{2,4} |                                # Matches MM/DD/YY(YY)
+      \d{1,2}\.\d{1,2}\.\d{2,4} |                              # Matches DD.MM.YY(YY)
+      \d{6} | \d{8}                                            # Matches MMDDYY or MMDDYYYY
     )\b
   }xi # 'x' allows extended mode, 'i' makes it case-insensitive