pretty errors

gistfile1.txt

atomo $ rlwrap atomo repl.atomo 
[0]> 1 +
------------------------------------------------------------------------------
*** parse error:
***   "<input>" (line 1, column 3):
***   unexpected '+'
***   expecting end of input

restarts:
  0: @retry
  1: @abort
[!]> :1
[1]> use: "therie"
<object (delegates to 1 object)>
  *nesting-level* := <object>
  stats := <object>
  indentation := ' ' repeat: (*nesting-level* _? * 2)
[2]> use: "therie" version: 2
------------------------------------------------------------------------------
*** package 'therie' with version constraint { == 2 } required, but an
*** incompatible version has already been loaded

restarts:
  0: @retry
  1: @abort
[!]> :1
[3]>