Hi mg,

      It's dangerous to let blank characters determine the grammar, which is
the lesson learned from Ruby ;-)

```ruby
def f(p)
  return p * 2
end

f(3+2)+1     #  11 
f (3+2)+1    #  12,  have you seen the space between `f` and `(`  ?
```
(you can try the above code at http://tryruby.org)

Cheers,
Daniel.Sun



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