Rollup merge of #34990 - abhijeetbhagat:patch-3, r=steveklabnik

Update underscore usage (#34903)
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Steve Klabnik 2016-07-26 17:21:12 -04:00 committed by GitHub
commit 96108bbb94

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* `|` (`|…| expr`): closures. See [Closures].
* `|=` (`var |= expr`): bitwise or & assignment. Overloadable (`BitOrAssign`).
* `||` (`expr || expr`): logical or.
* `_`: "ignored" pattern binding. See [Patterns (Ignoring bindings)].
* `_`: "ignored" pattern binding (see [Patterns (Ignoring bindings)]). Also used to make integer-literals readable (see [Reference (Integer literals)]).
## Other Syntax
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[Primitive Types (Tuples)]: primitive-types.html#tuples
[Raw Pointers]: raw-pointers.html
[Reference (Byte String Literals)]: ../reference.html#byte-string-literals
[Reference (Integer literals)]: ../reference.html#integer-literals
[Reference (Raw Byte String Literals)]: ../reference.html#raw-byte-string-literals
[Reference (Raw String Literals)]: ../reference.html#raw-string-literals
[References and Borrowing]: references-and-borrowing.html