Echo char
```nim
INim 0.2.4
Nim Compiler Version 0.18.1 [Linux: amd64] at /usr/bin/nim
>>> "a"
a : string
>>> 'a'
Error: expression 'echo' is of type 'proc (x: varargs[typed]){.gcsafe, locks: 0.}' and has to be discarded; for a function call use ()
>>>
```

It should print:
```nim
a : char
```
:cactus: 