Normalize use of backticks compiler messages

src/doc/rustc/src/lints/index.md

@@ -19,7 +19,7 @@ warning: unused variable: `x`
 2 |     let x = 5;
   |         ^
   |
-  = note: #[warn(unused_variables)] on by default
+  = note: `#[warn(unused_variables)]` on by default
   = note: to avoid this warning, consider using `_x` instead
 ```
 

src/doc/rustc/src/lints/levels.md

@@ -53,7 +53,7 @@ warning: unused variable: `x`
 2 |     let x = 5;
   |         ^
   |
-  = note: #[warn(unused_variables)] on by default
+  = note: `#[warn(unused_variables)]` on by default
   = note: to avoid this warning, consider using `_x` instead
 ```
 
@@ -76,7 +76,7 @@ error: bitshift exceeds the type's number of bits
 2 |     100u8 << 10;
   |     ^^^^^^^^^^^
   |
-  = note: #[deny(exceeding_bitshifts)] on by default
+  = note: `#[deny(exceeding_bitshifts)]` on by default
 ```
 
 What's the difference between an error from a lint and a regular old error?
@@ -236,7 +236,7 @@ warning: bitshift exceeds the type's number of bits
 2 |     100u8 << 10;
   |     ^^^^^^^^^^^
   |
-  = note: #[warn(exceeding_bitshifts)] on by default
+  = note: `#[warn(exceeding_bitshifts)]` on by default
 
 warning: this expression will panic at run-time
  --> lib.rs:2:5

src/doc/rustc/src/lints/listing/allowed-by-default.md

@@ -165,7 +165,7 @@ pub struct Foo;
 When set to 'deny', this will produce:
 
 ```text
-error: type does not implement `fmt::Debug`; consider adding #[derive(Debug)] or a manual implementation
+error: type does not implement `fmt::Debug`; consider adding `#[derive(Debug)]` or a manual implementation
  --> src/main.rs:3:1
   |
 3 | pub struct Foo;

src/doc/rustc/src/lints/listing/deny-by-default.md

@@ -40,7 +40,7 @@ error: defaults for type parameters are only allowed in `struct`, `enum`, `type`
 4 | fn foo<T=i32>(t: T) {}
   |        ^
   |
-  = note: #[deny(invalid_type_param_default)] on by default
+  = note: `#[deny(invalid_type_param_default)]` on by default
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887>
 ```
@@ -74,7 +74,7 @@ error: private struct constructors are not usable through re-exports in outer mo
 5 |         ::S;
   |         ^^^
   |
-  = note: #[deny(legacy_constructor_visibility)] on by default
+  = note: `#[deny(legacy_constructor_visibility)]` on by default
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #39207 <https://github.com/rust-lang/rust/issues/39207>
 ```
@@ -84,9 +84,9 @@ error: private struct constructors are not usable through re-exports in outer mo
 
 The legacy_directory_ownership warning is issued when
 
-* There is a non-inline module with a #[path] attribute (e.g. #[path = "foo.rs"] mod bar;),
+* There is a non-inline module with a `#[path]` attribute (e.g. `#[path = "foo.rs"] mod bar;`),
 * The module's file ("foo.rs" in the above example) is not named "mod.rs", and
-* The module's file contains a non-inline child module without a #[path] attribute.
+* The module's file contains a non-inline child module without a `#[path]` attribute.
 
 The warning can be fixed by renaming the parent module to "mod.rs" and moving
 it into its own directory if appropriate.
@@ -139,7 +139,7 @@ const FOO: i32 = 5;
 This will produce:
 
 ```text
-error: const items should never be #[no_mangle]
+error: const items should never be `#[no_mangle]`
  --> src/main.rs:3:1
   |
 3 | const FOO: i32 = 5;
@@ -187,7 +187,7 @@ error: parenthesized parameters may only be used with a trait
 2 |   let x = 5 as usize();
   |                     ^^
   |
-  = note: #[deny(parenthesized_params_in_types_and_modules)] on by default
+  = note: `#[deny(parenthesized_params_in_types_and_modules)]` on by default
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #42238 <https://github.com/rust-lang/rust/issues/42238>
 ```

src/doc/rustc/src/lints/listing/warn-by-default.md

@@ -90,7 +90,7 @@ warning: floating-point literals cannot be used in patterns
 4 |         5.0 => {},
   |         ^^^
   |
-  = note: #[warn(illegal_floating_point_literal_pattern)] on by default
+  = note: `#[warn(illegal_floating_point_literal_pattern)]` on by default
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
 ```
@@ -109,7 +109,7 @@ extern "C" {
 This will produce:
 
 ```text
-warning: found struct without foreign-function-safe representation annotation in foreign module, consider adding a #[repr(C)] attribute to the type
+warning: found struct without foreign-function-safe representation annotation in foreign module, consider adding a `#[repr(C)]` attribute to the type
  --> src/main.rs:2:20
   |
 2 |     static STATIC: String;
@@ -146,7 +146,7 @@ warning: cannot specify lifetime arguments explicitly if late bound lifetime par
 8 |     S.late::<'static>(&0, &0);
   |              ^^^^^^^
   |
-  = note: #[warn(late_bound_lifetime_arguments)] on by default
+  = note: `#[warn(late_bound_lifetime_arguments)]` on by default
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #42868 <https://github.com/rust-lang/rust/issues/42868>
 ```
@@ -327,7 +327,7 @@ warning: patterns aren't allowed in methods without bodies
 2 |     fn foo(mut arg: u8);
   |            ^^^^^^^
   |
-  = note: #[warn(patterns_in_fns_without_body)] on by default
+  = note: `#[warn(patterns_in_fns_without_body)]` on by default
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #35203 <https://github.com/rust-lang/rust/issues/35203>
 ```
@@ -406,7 +406,7 @@ fn foo() {}
 This will produce:
 
 ```text
-warning: function is marked #[no_mangle], but not exported
+warning: function is marked `#[no_mangle]`, but not exported
  --> src/main.rs:2:1
   |
 2 | fn foo() {}
@@ -433,7 +433,7 @@ static X: i32 = 4;
 This will produce:
 
 ```text
-warning: static is marked #[no_mangle], but not exported
+warning: static is marked `#[no_mangle]`, but not exported
  --> src/main.rs:2:1
   |
 2 | static X: i32 = 4;
@@ -496,7 +496,7 @@ warning: borrow of packed field requires unsafe function or block (error E0133)
 11 |     let y = &x.data.0;
    |             ^^^^^^^^^
    |
-   = note: #[warn(safe_packed_borrows)] on by default
+   = note: `#[warn(safe_packed_borrows)]` on by default
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #46043 <https://github.com/rust-lang/rust/issues/46043>
 ```
@@ -542,7 +542,7 @@ warning: bounds on generic parameters are not enforced in type aliases
 2 | type SendVec<T: Send> = Vec<T>;
   |                 ^^^^
   |
-  = note: #[warn(type_alias_bounds)] on by default
+  = note: `#[warn(type_alias_bounds)]` on by default
   = help: the bound will not be checked when the type alias is used, and should be removed
 ```
 
@@ -567,7 +567,7 @@ warning: type annotations needed
 4 |     if data.is_null() {}
   |             ^^^^^^^
   |
-  = note: #[warn(tyvar_behind_raw_pointer)] on by default
+  = note: `#[warn(tyvar_behind_raw_pointer)]` on by default
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
   = note: for more information, see issue #46906 <https://github.com/rust-lang/rust/issues/46906>
 ```
@@ -787,7 +787,7 @@ warning: doc comment not used by rustdoc
 
 ## unused-features
 
-This lint detects unused or unknown features found in crate-level #[feature] directives.
+This lint detects unused or unknown features found in crate-level `#[feature]` directives.
 To fix this, simply remove the feature flag.
 
 ## unused-imports
@@ -839,7 +839,7 @@ warning: unused macro definition
 
 ## unused-must-use
 
-This lint detects unused result of a type flagged as #[must_use]. Some
+This lint detects unused result of a type flagged as `#[must_use]`. Some
 example code that triggers this lint:
 
 ```rust

src/libcore/ptr/unique.rs

@@ -26,8 +26,8 @@ use crate::ptr::NonNull;
 /// Unlike `*mut T`, `Unique<T>` is covariant over `T`. This should always be correct
 /// for any type which upholds Unique's aliasing requirements.
 #[unstable(feature = "ptr_internals", issue = "0",
-           reason = "use NonNull instead and consider PhantomData<T> \
-                     (if you also use #[may_dangle]), Send, and/or Sync")]
+           reason = "use `NonNull` instead and consider `PhantomData<T>` \
+                     (if you also use `#[may_dangle]`), `Send`, and/or `Sync`")]
 #[doc(hidden)]
 #[repr(transparent)]
 #[rustc_layout_scalar_valid_range_start(1)]

src/librustc/error_codes.rs

@@ -485,7 +485,7 @@ Erroneous code example:
 fn foo() {}
 
 #[main]
-fn f() {} // error: multiple functions with a #[main] attribute
+fn f() {} // error: multiple functions with a `#[main]` attribute
 ```
 
 This error indicates that the compiler found multiple functions with the

src/librustc/hir/def_id.rs

@@ -69,14 +69,14 @@ impl CrateNum {
     pub fn as_usize(self) -> usize {
         match self {
             CrateNum::Index(id) => id.as_usize(),
-            _ => bug!("tried to get index of nonstandard crate {:?}", self),
+            _ => bug!("tried to get index of non-standard crate {:?}", self),
         }
     }
 
     pub fn as_u32(self) -> u32 {
         match self {
             CrateNum::Index(id) => id.as_u32(),
-            _ => bug!("tried to get index of nonstandard crate {:?}", self),
+            _ => bug!("tried to get index of non-standard crate {:?}", self),
         }
     }
 

src/librustc/hir/lowering.rs

@@ -1693,8 +1693,8 @@ impl<'a> LoweringContext<'a> {
                         if pos == ImplTraitPosition::Binding &&
                             nightly_options::is_nightly_build() {
                             help!(err,
-                                  "add #![feature(impl_trait_in_bindings)] to the crate attributes \
-                                   to enable");
+                                  "add `#![feature(impl_trait_in_bindings)]` to the crate \
+                                   attributes to enable");
                         }
                         err.emit();
                         hir::TyKind::Err

src/librustc/infer/lexical_region_resolve/mod.rs

@@ -873,7 +873,7 @@ impl<'cx, 'tcx> LexicalResolver<'cx, 'tcx> {
             constraints.retain(|constraint| {
                 let (edge_changed, retain) = body(constraint);
                 if edge_changed {
-                    debug!("Updated due to constraint {:?}", constraint);
+                    debug!("updated due to constraint {:?}", constraint);
                     changed = true;
                 }
                 retain

src/librustc/infer/region_constraints/leak_check.rs

@@ -78,10 +78,10 @@ impl<'tcx> RegionConstraintCollector<'tcx> {
                 }
 
                 return Err(if overly_polymorphic {
-                    debug!("Overly polymorphic!");
+                    debug!("overly polymorphic!");
                     TypeError::RegionsOverlyPolymorphic(placeholder.name, tainted_region)
                 } else {
-                    debug!("Not as polymorphic!");
+                    debug!("not as polymorphic!");
                     TypeError::RegionsInsufficientlyPolymorphic(placeholder.name, tainted_region)
                 });
             }

src/librustc/lint/builtin.rs

@@ -92,19 +92,19 @@ declare_lint! {
 declare_lint! {
     pub UNUSED_FEATURES,
     Warn,
-    "unused features found in crate-level #[feature] directives"
+    "unused features found in crate-level `#[feature]` directives"
 }
 
 declare_lint! {
     pub STABLE_FEATURES,
     Warn,
-    "stable features found in #[feature] directive"
+    "stable features found in `#[feature]` directive"
 }
 
 declare_lint! {
     pub UNKNOWN_CRATE_TYPES,
     Deny,
-    "unknown crate type found in #[crate_type] directive"
+    "unknown crate type found in `#[crate_type]` directive"
 }
 
 declare_lint! {

src/librustc/lint/mod.rs

@@ -670,7 +670,7 @@ pub fn struct_lint_level<'a>(sess: &'a Session,
             sess.diag_note_once(
                 &mut err,
                 DiagnosticMessageId::from(lint),
-                &format!("#[{}({})] on by default", level.as_str(), name));
+                &format!("`#[{}({})]` on by default", level.as_str(), name));
         }
         LintSource::CommandLine(lint_flag_val) => {
             let flag = match level {
@@ -705,7 +705,7 @@ pub fn struct_lint_level<'a>(sess: &'a Session,
             if lint_attr_name.as_str() != name {
                 let level_str = level.as_str();
                 sess.diag_note_once(&mut err, DiagnosticMessageId::from(lint),
-                                    &format!("#[{}({})] implied by #[{}({})]",
+                                    &format!("`#[{}({})]` implied by `#[{}({})]`",
                                              level_str, name, level_str, lint_attr_name));
             }
         }

src/librustc/middle/entry.rs

@@ -120,9 +120,9 @@ fn find_item(item: &Item, ctxt: &mut EntryContext<'_, '_>, at_root: bool) {
                 ctxt.attr_main_fn = Some((item.hir_id, item.span));
             } else {
                 struct_span_err!(ctxt.session, item.span, E0137,
-                                 "multiple functions with a #[main] attribute")
-                .span_label(item.span, "additional #[main] function")
-                .span_label(ctxt.attr_main_fn.unwrap().1, "first #[main] function")
+                                 "multiple functions with a `#[main]` attribute")
+                .span_label(item.span, "additional `#[main]` function")
+                .span_label(ctxt.attr_main_fn.unwrap().1, "first `#[main]` function")
                 .emit();
             }
         },

src/librustc/middle/mem_categorization.rs

@@ -1069,7 +1069,7 @@ impl<'a, 'tcx> MemCategorizationContext<'a, 'tcx> {
         let deref_ty = match base_cmt_ty.builtin_deref(true) {
             Some(mt) => mt.ty,
             None => {
-                debug!("Explicit deref of non-derefable type: {:?}", base_cmt_ty);
+                debug!("explicit deref of non-derefable type: {:?}", base_cmt_ty);
                 return Err(());
             }
         };
@@ -1392,7 +1392,7 @@ impl<'a, 'tcx> MemCategorizationContext<'a, 'tcx> {
                 let element_ty = match cmt.ty.builtin_index() {
                     Some(ty) => ty,
                     None => {
-                        debug!("Explicit index of non-indexable type {:?}", cmt);
+                        debug!("explicit index of non-indexable type {:?}", cmt);
                         return Err(());
                     }
                 };

src/librustc/middle/resolve_lifetime.rs

@@ -1615,7 +1615,7 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> {
                     }
                 }
                 Some(LifetimeUseSet::Many) => {
-                    debug!("Not one use lifetime");
+                    debug!("not one use lifetime");
                 }
                 None => {
                     let hir_id = self.tcx.hir().as_local_hir_id(def_id).unwrap();

src/librustc/query/mod.rs

@@ -641,19 +641,19 @@ rustc_queries! {
         }
         query is_sanitizer_runtime(_: CrateNum) -> bool {
             fatal_cycle
-            desc { "query a crate is #![sanitizer_runtime]" }
+            desc { "query a crate is `#![sanitizer_runtime]`" }
         }
         query is_profiler_runtime(_: CrateNum) -> bool {
             fatal_cycle
-            desc { "query a crate is #![profiler_runtime]" }
+            desc { "query a crate is `#![profiler_runtime]`" }
         }
         query panic_strategy(_: CrateNum) -> PanicStrategy {
             fatal_cycle
             desc { "query a crate's configured panic strategy" }
         }
         query is_no_builtins(_: CrateNum) -> bool {
             fatal_cycle
-            desc { "test whether a crate has #![no_builtins]" }
+            desc { "test whether a crate has `#![no_builtins]`" }
         }
         query symbol_mangling_version(_: CrateNum) -> SymbolManglingVersion {
             fatal_cycle