Araq/Nimrod — Issue #73: It should not be Redefined Error in REPL.
Author: esehara
Created: 2011-12-08 18:59:00+00:00
State: open

example:

```
>>> proc echo_int(a,b:int,x,y:var int) =
...	x = a
stdin(14, 0) Error: tabulators are not allowed
>>> proc echo_int(a,b:int,x,y:var int) =
...	x = a
stdin(15, 0) Error: tabulators are not allowed
stdin(14, 4) Error: redefinition of 'echo_int'
```

In example, "echo_int" proc is Error.then, "echo-int" should be un-defined,and could redefine.