Land rapid7#7739, async output revert until fixed

Author: wvu

lib/rex/ui/text/input/readline.rb

@@ -133,16 +133,27 @@ def intrinsic_shell?
     private
 
     def readline_with_output(prompt, add_history=false)
-      # rb-readlines's Readline.readline hardcodes the input and output to $stdin and $stdout, which means setting
-      # `Readline.input` or `Readline.ouput` has no effect when running `Readline.readline` with rb-readline, so need
-      # to reimplement []`Readline.readline`](https://github.com/luislavena/rb-readline/blob/ce4908dae45dbcae90a6e42e3710b8c3a1f2cd64/lib/readline.rb#L36-L58)
-      # for rb-readline to support setting input and output.  Output needs to be set so that colorization works for the
-      # prompt on Windows.
+      # rb-readlines's Readline.readline hardcodes the input and output to
+      # $stdin and $stdout, which means setting `Readline.input` or
+      # `Readline.ouput` has no effect when running `Readline.readline` with
+      # rb-readline, so need to reimplement
+      # []`Readline.readline`](https://github.com/luislavena/rb-readline/blob/ce4908dae45dbcae90a6e42e3710b8c3a1f2cd64/lib/readline.rb#L36-L58)
+      # for rb-readline to support setting input and output.  Output needs to
+      # be set so that colorization works for the prompt on Windows.
       self.prompt = prompt
+
+      # TODO: there are unhandled quirks in async output buffering that
+      # we have not solved yet, for instance when loading meterpreter
+      # extensions, supporting Windows, printing output from commands, etc.
+      # Remove this guard when issues are resolved.
+=begin
       reset_sequence = "\n\001\r\033[K\002"
       if (/mingw/ =~ RUBY_PLATFORM)
         reset_sequence = ""
       end
+=end
+      reset_sequence = ""
+
       if defined? RbReadline
         RbReadline.rl_instream = fd
         RbReadline.rl_outstream = output

lib/rex/ui/text/output/stdio.rb

@@ -58,6 +58,11 @@ def io
   # Use ANSI Control chars to reset prompt position for async output
   # SEE https://github.com/rapid7/metasploit-framework/pull/7570
   def print_line(msg = '')
+    # TODO: there are unhandled quirks in async output buffering that
+    # we have not solved yet, for instance when loading meterpreter
+    # extensions, supporting Windows, printing output from commands, etc.
+    # Remove this guard when issues are resolved.
+=begin
     if (/mingw/ =~ RUBY_PLATFORM)
       print(msg + "\n")
       return
@@ -70,6 +75,9 @@ def print_line(msg = '')
       print(input.line_buffer.tr("\001\002", ''))
       print("\033[u\033[B") # Restore cursor, move down one line
     end
+=end
+
+    print(msg + "\n")
   end
 
   #