register new lint "tabs in doc comments" and update readme

Author: Florian Rohm

CHANGELOG.md

@@ -1201,6 +1201,7 @@ Released 2018-09-13
 [`suspicious_map`]: https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_map
 [`suspicious_op_assign_impl`]: https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_op_assign_impl
 [`suspicious_unary_op_formatting`]: https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_unary_op_formatting
+[`tabs_in_doc_comments`]: https://rust-lang.github.io/rust-clippy/master/index.html#tabs_in_doc_comments
 [`temporary_assignment`]: https://rust-lang.github.io/rust-clippy/master/index.html#temporary_assignment
 [`temporary_cstring_as_ptr`]: https://rust-lang.github.io/rust-clippy/master/index.html#temporary_cstring_as_ptr
 [`to_digit_is_some`]: https://rust-lang.github.io/rust-clippy/master/index.html#to_digit_is_some

README.md

@@ -6,7 +6,7 @@
 
 A collection of lints to catch common mistakes and improve your [Rust](https://github.com/rust-lang/rust) code.
 
-[There are 333 lints included in this crate!](https://rust-lang.github.io/rust-clippy/master/index.html)
+[There are 334 lints included in this crate!](https://rust-lang.github.io/rust-clippy/master/index.html)
 
 We have a bunch of lint categories to allow you to choose how much Clippy is supposed to ~~annoy~~ help you:
 

clippy_lints/src/lib.rs

@@ -275,6 +275,7 @@ pub mod slow_vector_initialization;
 pub mod strings;
 pub mod suspicious_trait_impl;
 pub mod swap;
+pub mod tabs_in_doc_comments;
 pub mod temporary_assignment;
 pub mod to_digit_is_some;
 pub mod trait_bounds;
@@ -717,6 +718,7 @@ pub fn register_plugins(store: &mut lint::LintStore, sess: &Session, conf: &Conf
         &suspicious_trait_impl::SUSPICIOUS_OP_ASSIGN_IMPL,
         &swap::ALMOST_SWAPPED,
         &swap::MANUAL_SWAP,
+        &tabs_in_doc_comments::TABS_IN_DOC_COMMENTS,
         &temporary_assignment::TEMPORARY_ASSIGNMENT,
         &to_digit_is_some::TO_DIGIT_IS_SOME,
         &trait_bounds::TYPE_REPETITION_IN_BOUNDS,
@@ -947,6 +949,7 @@ pub fn register_plugins(store: &mut lint::LintStore, sess: &Session, conf: &Conf
     store.register_early_pass(|| box utils::internal_lints::ClippyLintsInternal);
     let enum_variant_name_threshold = conf.enum_variant_name_threshold;
     store.register_early_pass(move || box enum_variants::EnumVariantNames::new(enum_variant_name_threshold));
+    store.register_early_pass(|| box tabs_in_doc_comments::TabsInDocComments);
     store.register_late_pass(|| box unused_self::UnusedSelf);
     store.register_late_pass(|| box mutable_debug_assertion::DebugAssertWithMutCall);
     store.register_late_pass(|| box exit::Exit);
@@ -1244,6 +1247,7 @@ pub fn register_plugins(store: &mut lint::LintStore, sess: &Session, conf: &Conf
         LintId::of(&suspicious_trait_impl::SUSPICIOUS_OP_ASSIGN_IMPL),
         LintId::of(&swap::ALMOST_SWAPPED),
         LintId::of(&swap::MANUAL_SWAP),
+        LintId::of(&tabs_in_doc_comments::TABS_IN_DOC_COMMENTS),
         LintId::of(&temporary_assignment::TEMPORARY_ASSIGNMENT),
         LintId::of(&to_digit_is_some::TO_DIGIT_IS_SOME),
         LintId::of(&transmute::CROSSPOINTER_TRANSMUTE),
@@ -1371,6 +1375,7 @@ pub fn register_plugins(store: &mut lint::LintStore, sess: &Session, conf: &Conf
         LintId::of(&returns::NEEDLESS_RETURN),
         LintId::of(&returns::UNUSED_UNIT),
         LintId::of(&strings::STRING_LIT_AS_BYTES),
+        LintId::of(&tabs_in_doc_comments::TABS_IN_DOC_COMMENTS),
         LintId::of(&to_digit_is_some::TO_DIGIT_IS_SOME),
         LintId::of(&try_err::TRY_ERR),
         LintId::of(&types::FN_TO_NUMERIC_CAST),

src/lintlist/mod.rs

@@ -6,7 +6,7 @@ pub use lint::Lint;
 pub use lint::LINT_LEVELS;
 
 // begin lint list, do not remove this comment, it’s used in `update_lints`
-pub const ALL_LINTS: [Lint; 333] = [
+pub const ALL_LINTS: [Lint; 334] = [
     Lint {
         name: "absurd_extreme_comparisons",
         group: "correctness",
@@ -1862,6 +1862,13 @@ pub const ALL_LINTS: [Lint; 333] = [
         deprecation: None,
         module: "formatting",
     },
+    Lint {
+        name: "tabs_in_doc_comments",
+        group: "style",
+        desc: "using tabs in doc comments is not recommended",
+        deprecation: None,
+        module: "tabs_in_doc_comments",
+    },
     Lint {
         name: "temporary_assignment",
         group: "complexity",