updated manual
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@ -573,8 +573,7 @@ The top level of this tree is a module that is anonymous (from the point of view
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The Rust compiler is always invoked with a single source file as input, and always produces a single output crate.
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The processing of that source file may result in other source files being loaded as modules.
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Source files typically have the extension `.rs` but, by convention,
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source files that represent crates have the extension `.rc`, called *crate files*.
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Source files have the extension `.rs`.
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A Rust source file describes a module, the name and
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location of which -- in the module tree of the current crate -- are defined
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@ -3286,7 +3285,7 @@ As an example, to see all the logs generated by the compiler, you would set
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you would set it to `rustc::metadata::creader`. To see just error logging
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use `rustc=0`.
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Note that when compiling either `.rs` or `.rc` files that don't specify a
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Note that when compiling source files that don't specify a
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crate name the crate is given a default name that matches the source file,
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with the extension removed. In that case, to turn on logging for a program
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compiled from, e.g. `helloworld.rs`, `RUST_LOG` should be set to `helloworld`.
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