Merge pull request scala#1122 from nivekastoreth/patch-1

Fix order of operators in precedence documentation

Author: SethTisue

_tour/operators.md

@@ -78,4 +78,4 @@ Is equivalent to
 ```
 ((a + b) ^? (c ?^ d)) less ((a ==> b) | c)
 ```
-`?^` has the highest precedence because it starts with the character `?`. `+` has the second highest precedence, followed by `^?`, `==>`, `|`, and `less`.
+`?^` has the highest precedence because it starts with the character `?`. `+` has the second highest precedence, followed by `==>`, `^?`, `|`, and `less`.