Deprecate should_assert_eq lint

This should close #2090.

Author: cgm616

README.md

@@ -7,7 +7,7 @@
 
 A collection of lints to catch common mistakes and improve your [Rust](https://github.com/rust-lang/rust) code.
 
-[There are 209 lints included in this crate!](https://rust-lang-nursery.github.io/rust-clippy/master/index.html)
+[There are 208 lints included in this crate!](https://rust-lang-nursery.github.io/rust-clippy/master/index.html)
 
 More to come, please [file an issue](https://github.com/rust-lang-nursery/rust-clippy/issues) if you have ideas!
 

clippy_lints/src/deprecated_lints.rs

@@ -4,6 +4,14 @@ macro_rules! declare_deprecated_lint {
     }
 }
 
+/// **What it does:** Nothing. This lint has been deprecated.
+///
+/// **Deprecation reason:** This used to check for `assert!(a == b)` and recommend 
+/// replacement with `assert_eq!(a, b)`, but this is no longer needed after RFC 2011.
+declare_deprecated_lint! {
+    pub SHOULD_ASSERT_EQ,
+    "`assert!()` will be more flexible with RFC 2011"
+}
 
 /// **What it does:** Nothing. This lint has been deprecated.
 ///

clippy_lints/src/lib.rs

@@ -144,7 +144,6 @@ pub mod regex;
 pub mod returns;
 pub mod serde_api;
 pub mod shadow;
-pub mod should_assert_eq;
 pub mod strings;
 pub mod explicit_write;
 pub mod swap;
@@ -200,6 +199,10 @@ pub fn register_plugins(reg: &mut rustc_plugin::Registry) {
     };
 
     let mut store = reg.sess.lint_store.borrow_mut();
+    store.register_removed(
+        "should_assert_eq",
+        "`assert!()` will be more flexible with RFC 2011"
+    );
     store.register_removed(
         "extend_from_slice",
         "`.extend_from_slice(_)` is a faster way to extend a Vec by a slice",
@@ -327,7 +330,6 @@ pub fn register_plugins(reg: &mut rustc_plugin::Registry) {
     reg.register_early_lint_pass(box double_parens::DoubleParens);
     reg.register_late_lint_pass(box unused_io_amount::UnusedIoAmount);
     reg.register_late_lint_pass(box large_enum_variant::LargeEnumVariant::new(conf.enum_variant_size_threshold));
-    reg.register_late_lint_pass(box should_assert_eq::ShouldAssertEq);
     reg.register_late_lint_pass(box explicit_write::Pass);
     reg.register_late_lint_pass(box needless_pass_by_value::NeedlessPassByValue);
     reg.register_early_lint_pass(box literal_digit_grouping::LiteralDigitGrouping);
@@ -542,7 +544,6 @@ pub fn register_plugins(reg: &mut rustc_plugin::Registry) {
         returns::LET_AND_RETURN,
         returns::NEEDLESS_RETURN,
         serde_api::SERDE_API_MISUSE,
-        should_assert_eq::SHOULD_ASSERT_EQ,
         strings::STRING_LIT_AS_BYTES,
         explicit_write::EXPLICIT_WRITE,
         swap::ALMOST_SWAPPED,