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auto merge of #11235 : am0d/rust/doc_update, r=brson

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Running a rust program with `RUST_LOG=::help` no longer shows all the logging modules that are mentioned in the docs.  These should be removed from the docs as they no longer do anything.
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bors 2014-01-01 18:26:57 -08:00
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@ -3806,25 +3806,6 @@ As a convenience, the logging spec can also be set to a special pseudo-crate,
`::help`. In this case, when the application starts, the runtime will
simply output a list of loaded modules containing log expressions, then exit.
The Rust runtime itself generates logging information. The runtime's logs are
generated for a number of artificial modules in the `::rt` pseudo-crate,
and can be enabled just like the logs for any standard module. The full list
of runtime logging modules follows.
* `::rt::mem` Memory management
* `::rt::comm` Messaging and task communication
* `::rt::task` Task management
* `::rt::dom` Task scheduling
* `::rt::trace` Unused
* `::rt::cache` Type descriptor cache
* `::rt::upcall` Compiler-generated runtime calls
* `::rt::timer` The scheduler timer
* `::rt::gc` Garbage collection
* `::rt::stdlib` Functions used directly by the standard library
* `::rt::kern` The runtime kernel
* `::rt::backtrace` Log a backtrace on task failure
* `::rt::callback` Unused
#### Logging Expressions
Rust provides several macros to log information. Here's a simple Rust program