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Fix two minor issues in the tutorial. #4347

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Fix two minor issues in the tutorial. #4347

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4 changes: 2 additions & 2 deletions doc/tutorial.md
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Expand Up @@ -226,9 +226,9 @@ let monster_size: int = 50;
~~~~

Local variables may shadow earlier declarations, as in the previous example:
`monster_size` was first declared as a `float`, and then then a second
`monster_size` was first declared as a `float`, and then a second
`monster_size` was declared as an int. If you were to actually compile this
example, though, the compiler will determine that the second `monster_size` is
example, though, the compiler will determine that the first `monster_size` is
unused and issue a warning (because this situation is likely to indicate a
programmer error). For occasions where unused variables are intentional, their
name may be prefixed with an underscore to silence the warning, like `let
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