Update ch15-02-deref.md #2780
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Update ch15-02-deref.md #2780
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Was confused by this line. `String`'s `deref` implementation actually returns a [`&str`](https://doc.rust-lang.org/beta/src/alloc/string.rs.html#2305), not `str`.
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Update books ## nomicon 8 commits in b9ca313e687c991223e23e5520529815dc281205..7a13537f96af4b9b8e3ea296d6e5c3c7ab72ce9f 2021-06-22 12:02:20 -0400 to 2021-07-05 23:34:47 -0400 - Apply review comments - Fix some style issues - Move the list of coercions to the reference - Add an example that shows the null-pointer opt does not happen - Remove casting list from the nomicon (rust-lang/nomicon#287) - Audit `ignore` annotations (rust-lang/nomicon#288) - rename typo "lifetime" to "reference" (rust-lang/nomicon#286) - Add an incomplete warning to the top page (rust-lang/nomicon#274) ## reference 7 commits in d9699fa8f3186440fdaadd703d63d8d42322c176..ab60513a3a5a0591e237fddff5d027a982648392 2021-06-21 12:23:10 -0700 to 2021-07-05 08:27:31 -0700 - fix grammar in Expressions (rust-lang/reference#1057) - fix comment in function parameter drop scope example (rust-lang/reference#1056) - fix typo in macro-ambiguity.md (rust-lang/reference#1058) - Mention (negative) infinity values on float-to-int casting (rust-lang/reference#1054) - (rust-lang/reference#841) - Missing TypeParamBounds in TypeAlias (rust-lang/reference#1036) - Be more precise about array offset in type layouts (rust-lang/reference#1034) ## book 34 commits in 55a26488ddefc8433e73a2e8352d70f7a5c7fc2b..a90f07f1e9a7fc75dc9105a6c6f16d5c13edceb0 2021-05-09 12:03:18 -0500 to 2021-07-05 14:43:12 -0400 - Clarify ?Sized syntax. Fixes rust-lang/book#2422. - Add some notes that macros are different than functions - Break up a long sentence. Fixes rust-lang/book#2329. - Further clarify and make consistent the reference to deref coercion - Update ch04-03-slices.md - add usage for `String` reference - Update ch15-02-deref.md (rust-lang/book#2780) - Remove claim about performance of i32 - Reword to avoid awkward pluralization - Make the link to the reference relative - Merge remote-tracking branch 'origin/pr/2753' - Reword number of library crates a package contains (rust-lang/book#2750) - Clarify explanation of why you can test private functions; add link - Merge remote-tracking branch 'origin/pr/2743' - Fix code hiding that I broke in eb60fedc9 - Link to the exact later section we're talking about - improve cross-references for newtype pattern - ch12-05, listing 12-20: Add missing "does not compile" warning (rust-lang/book#2731) - cargo format - Merge remote-tracking branch 'origin/pr/2724' - Remove ordinal numbers and only refer to indexes to avoid confusion - Let's mention the former and current authors of tlborm. - Update tlborm link to point to Veykril's up-to-date version (rust-lang/book#2722) - Merge remote-tracking branch 'origin/pr/2720' - Describe the ferris pictures in the alt text - Merge remote-tracking branch 'origin/pr/2707' - Reword ... explanation to include the word deprecated, list that first - Precise that the `...` inclusive range pattern has been replaces (rust-lang/book#2714) - (rust-lang/book#2696) - fix typo: missing "type" after generic (rust-lang/book#2777) - (rust-lang/book#2709) - Remove sentence about how Rust used to be - Fix a potentially confusing statement about static lifetimes of static variables. (rust-lang/book#2692) - Replace 'which'. (rust-lang/book#2663) ## rust-by-example 2 commits in 805e016c5792ad2adabb66e348233067d5ea9f10..028f93a61500fe8f746ee7cc6b204ea6c9f42935 2021-05-20 17:08:34 -0300 to 2021-07-06 06:28:53 -0300 - Fix a couple of typos in the `integration_testing.md` file (rust-lang/rust-by-example#1448) - Fix Structures type list (rust-lang/rust-by-example#1446) ## rustc-dev-guide 13 commits in fe34beddb41dea5cb891032512a8d5b842b99696..60e282559104035985331645907c3d9f842312c5 2021-06-21 21:50:12 +0200 to 2021-07-05 11:21:03 -0400 - Fixed typos in inline code - Document lang items (rust-lang/rustc-dev-guide#1119) - More specifics on what future-incompatible lints are used for - Fix line lens - Update information on lints particularly on future-incompatible - Update section of lint store - Update around half of the January 2021 date references (rust-lang/rustc-dev-guide#1155) - Create issues for many TODOs (rust-lang/rustc-dev-guide#1163) - Links from rustc-dev-guide to std-dev-guide (rust-lang/rustc-dev-guide#1152) - Document how to mark features as incomplete (rust-lang/rustc-dev-guide#1151) - Remove requests or suggestions about rebase and fixup contradictory to rust-highfive bot comment (rust-lang/rustc-dev-guide#1111) - Generate glossary table correctly (rust-lang/rustc-dev-guide#1146) - Correct the wrong serial number (rust-lang/rustc-dev-guide#1147) ## edition-guide 3 commits in c74b2a0d6bf55774cf15d69f05dfe05408b8f81a..5d57b3832f8d308a9f478ce0a69799548f27ad4d 2021-06-14 10:48:27 -0700 to 2021-07-05 10:33:32 +0200 - Add more info for warnings promoted to errors (rust-lang/edition-guide#247) - Create triagebot.toml - Clarify snippets in 2021 panic docs. (rust-lang/edition-guide#245) ## embedded-book 1 commits in cbec77fbd8eea0c13e390dd9eded1ae200e811d1..506840eb73b0749336e1d5274e16d6393892ee82 2021-06-10 06:26:32 +0000 to 2021-06-24 00:01:32 +0000 - Update book to track quickstart changes (rust-embedded/book#296)
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The current explanation of why
&Stringwill be coerced into&stris misleading.String'sderefimplementation actually returns&str, notstr.