[docs] The usage information in ashell.md does not match with actual output

[xiaolongx]

Following the ashell.md, the usage information does not match with the actual output in serial log.

Help Command:

acm> help
'A Shell' bash

Commands list:
   help This help
   eval Evaluate JavaScript in real-time
  clear Clear the terminal screen
   load [FILE] Saves the input text into a file
    run [FILE] Runs the JavaScript program in the file
   stop Stops current JavaScript execution
     ls [FILE] List directory contents or file stat
    cat [FILE] Print the file contents on the stdout
     du [FILE] Estimate file space usage
     rm [FILE] Remove file or directory
     mv [SOURCE] [DEST] Move a file to destination
    set Sets the input mode for 'load' accept data
       transfer raw
       transfer ihex
 reboot Reboots the device

Actual Output:

acm> help
'A Shell' bash

Commands list:
    help This help
    eval Evaluate JavaScript in realtime
   clear Clear the terminal screen
    load [FILE] Saves the input text into a file
     run [FILE] Runs the JavaScript program in the file
   parse [FILE] Check if the JS syntax is correct
    stop Stops current JavaScript execution
      ls [FILE] List directory contents or file stat
     cat [FILE] Print the file contents of a file
      du [FILE] Estimate file space usage
      rm [FILE] Remove file or directory
      mv [SOURCE] [DEST] Move a file to destination
   rmdir [TODO]
   mkdir [TODO]
    test Runs your current test
   error Prints an error using JerryScript
    ping Prints '[PONG]' to check that we are alive
      at OK used by the driver when initializing
     set Sets the input mode for 'load' accept data
        transfer raw
        transfer ihex
     get Get states on the shell
  reboot Reboots the device

Eval Command:

acm> eval

Ready to evaluate JavaScript.
        Ctrl+X or Ctrl+C to return to shell.
js>

Actual Output:

acm> eval
Ready to evaluate JavaScript.
        Ctrl+D or Ctrl+C to return to shell.
js>

Load Command:

acm> load test.js

Saving to 'test.js'
Ready for JavaScript.
        Ctrl+Z to finish transfer.
        Ctrl+X or Ctrl+C to cancel.
RAW>

Actual Output:

acm> load test.js

Saving to '1.js'
Ready for JavaScript.
        Ctrl+Z or Ctrl+D to finish transfer.
        Ctrl+X or Ctrl+C
RAW>

[grgustaf]

Please update documentation.

[grgustaf]

@brianjjones this should be worth doing for 0.3, bumped to P1.

[brianjjones]

This will be fixed by #891

[qiaojingx]

Verified with commit 694cf15 in master.
Still got inconsistent output when using load and eval command.