Inclusive ranges are not stable, don't tell people to use them

Author: shepmaster

first-edition/src/iterators.md

@@ -14,10 +14,9 @@ Now that you know more Rust, we can talk in detail about how this works.
 Ranges (the `0..10`) are 'iterators'. An iterator is something that we can
 call the `.next()` method on repeatedly, and it gives us a sequence of things.
 
-(By the way, a range with two dots like `0..10` is inclusive on the left (so it
+A range with two dots like `0..10` is inclusive on the left (so it
 starts at 0) and exclusive on the right (so it ends at 9). A mathematician
-would write "[0, 10)". To get a range that goes all the way up to 10 you can
-write `0...10`.)
+would write "[0, 10)".
 
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