Update to rustfmt-preview (#348)
* Update to rustfmt-preview. * Run "cargo fmt --all" with rustfmt 0.4.1. rustfmt 0.4.1 is the latest release of rustfmt-preview available on the stable channel. * Fix a long line that rustfmt 0.4.1 can't handle. * Remove unneeded commas left behind by rustfmt.
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@@ -7,11 +7,11 @@
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//! > Briggs, Torczon, *An efficient representation for sparse sets*,
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//! ACM Letters on Programming Languages and Systems, Volume 2, Issue 1-4, March-Dec. 1993.
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use {EntityMap, EntityRef};
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use std::mem;
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use std::slice;
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use std::u32;
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use std::vec::Vec;
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use {EntityMap, EntityRef};
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/// Trait for extracting keys from values stored in a `SparseMap`.
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///
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