Downgrade nonstandard_macro_braces to nursery

Author: dtolnay

clippy_lints/src/lib.rs

@@ -1375,7 +1375,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(non_expressive_names::JUST_UNDERSCORES_AND_DIGITS),
         LintId::of(non_expressive_names::MANY_SINGLE_CHAR_NAMES),
         LintId::of(non_octal_unix_permissions::NON_OCTAL_UNIX_PERMISSIONS),
-        LintId::of(nonstandard_macro_braces::NONSTANDARD_MACRO_BRACES),
         LintId::of(open_options::NONSENSICAL_OPEN_OPTIONS),
         LintId::of(option_env_unwrap::OPTION_ENV_UNWRAP),
         LintId::of(overflow_check_conditional::OVERFLOW_CHECK_CONDITIONAL),
@@ -1546,7 +1545,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(non_copy_const::DECLARE_INTERIOR_MUTABLE_CONST),
         LintId::of(non_expressive_names::JUST_UNDERSCORES_AND_DIGITS),
         LintId::of(non_expressive_names::MANY_SINGLE_CHAR_NAMES),
-        LintId::of(nonstandard_macro_braces::NONSTANDARD_MACRO_BRACES),
         LintId::of(ptr::CMP_NULL),
         LintId::of(ptr::PTR_ARG),
         LintId::of(ptr_eq::PTR_EQ),
@@ -1791,6 +1789,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(missing_const_for_fn::MISSING_CONST_FOR_FN),
         LintId::of(mutable_debug_assertion::DEBUG_ASSERT_WITH_MUT_CALL),
         LintId::of(mutex_atomic::MUTEX_INTEGER),
+        LintId::of(nonstandard_macro_braces::NONSTANDARD_MACRO_BRACES),
         LintId::of(path_buf_push_overwrite::PATH_BUF_PUSH_OVERWRITE),
         LintId::of(redundant_pub_crate::REDUNDANT_PUB_CRATE),
         LintId::of(regex::TRIVIAL_REGEX),

clippy_lints/src/nonstandard_macro_braces.rs

@@ -31,7 +31,7 @@ declare_clippy_lint! {
     /// vec![1, 2, 3];
     /// ```
     pub NONSTANDARD_MACRO_BRACES,
-    style,
+    nursery,
     "check consistent use of braces in macro"
 }
 

tests/ui-toml/nonstandard_macro_braces/conf_nonstandard_macro_braces.rs

@@ -1,4 +1,4 @@
-// #![warn(clippy::nonstandard_macro_braces)]
+#![warn(clippy::nonstandard_macro_braces)]
 
 extern crate quote;