address comments

compiler/rustc_expand/src/mbe/macro_rules.rs

@@ -969,7 +969,7 @@ fn check_matcher_core(
                                         &OR_PATTERNS_BACK_COMPAT,
                                         span,
                                         ast::CRATE_NODE_ID,
-                                        &*format!("the meaning of the pat fragment specific is changing in Rust 2021, which may affect this macro",),
+                                        &*format!("the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro",),
                                         BuiltinLintDiagnostics::OrPatternsBackCompat(
                                             span, suggestion,
                                         ),

src/test/ui/macros/macro-or-patterns-back-compat.fixed

@@ -4,13 +4,13 @@
 #![feature(edition_macro_pats)]
 #![deny(or_patterns_back_compat)]
 #![allow(unused_macros)]
-macro_rules! foo { ($x:pat2015 | $y:pat) => {} } //~ ERROR the meaning of the pat fragment specific is changing in Rust 2021, which may affect this macro
-macro_rules! bar { ($($x:pat2015)+ | $($y:pat)+) => {} } //~ ERROR the meaning of the pat fragment specific is changing in Rust 2021, which may affect this macro
+macro_rules! foo { ($x:pat2015 | $y:pat) => {} } //~ ERROR the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro
+macro_rules! bar { ($($x:pat2015)+ | $($y:pat)+) => {} } //~ ERROR the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro
 macro_rules! baz { ($x:pat2015 | $y:pat2015) => {} } // should be ok
 macro_rules! qux { ($x:pat2015 | $y:pat) => {} } // should be ok
-macro_rules! ogg { ($x:pat2015 | $y:pat2015) => {} } //~ ERROR the meaning of the pat fragment specific is changing in Rust 2021, which may affect this macro
+macro_rules! ogg { ($x:pat2015 | $y:pat2015) => {} } //~ ERROR the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro
 macro_rules! match_any {
-    ( $expr:expr , $( $( $pat:pat2015 )|+ => $expr_arm:expr ),+ ) => { //~ ERROR the meaning of the pat fragment specific is changing in Rust 2021, which may affect this macro
+    ( $expr:expr , $( $( $pat:pat2015 )|+ => $expr_arm:expr ),+ ) => { //~ ERROR the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro
         match $expr {
             $(
                 $( $pat => $expr_arm, )+

src/test/ui/macros/macro-or-patterns-back-compat.rs

@@ -4,13 +4,13 @@
 #![feature(edition_macro_pats)]
 #![deny(or_patterns_back_compat)]
 #![allow(unused_macros)]
-macro_rules! foo { ($x:pat | $y:pat) => {} } //~ ERROR the meaning of the pat fragment specific is changing in Rust 2021, which may affect this macro
-macro_rules! bar { ($($x:pat)+ | $($y:pat)+) => {} } //~ ERROR the meaning of the pat fragment specific is changing in Rust 2021, which may affect this macro
+macro_rules! foo { ($x:pat | $y:pat) => {} } //~ ERROR the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro
+macro_rules! bar { ($($x:pat)+ | $($y:pat)+) => {} } //~ ERROR the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro
 macro_rules! baz { ($x:pat2015 | $y:pat2015) => {} } // should be ok
 macro_rules! qux { ($x:pat2015 | $y:pat) => {} } // should be ok
-macro_rules! ogg { ($x:pat | $y:pat2015) => {} } //~ ERROR the meaning of the pat fragment specific is changing in Rust 2021, which may affect this macro
+macro_rules! ogg { ($x:pat | $y:pat2015) => {} } //~ ERROR the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro
 macro_rules! match_any {
-    ( $expr:expr , $( $( $pat:pat )|+ => $expr_arm:expr ),+ ) => { //~ ERROR the meaning of the pat fragment specific is changing in Rust 2021, which may affect this macro
+    ( $expr:expr , $( $( $pat:pat )|+ => $expr_arm:expr ),+ ) => { //~ ERROR the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro
         match $expr {
             $(
                 $( $pat => $expr_arm, )+

src/test/ui/macros/macro-or-patterns-back-compat.stderr

@@ -1,4 +1,4 @@
-error: the meaning of the pat fragment specific is changing in Rust 2021, which may affect this macro
+error: the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro
   --> $DIR/macro-or-patterns-back-compat.rs:7:21
    |
 LL | macro_rules! foo { ($x:pat | $y:pat) => {} }
@@ -10,19 +10,19 @@ note: the lint level is defined here
 LL | #![deny(or_patterns_back_compat)]
    |         ^^^^^^^^^^^^^^^^^^^^^^^
 
-error: the meaning of the pat fragment specific is changing in Rust 2021, which may affect this macro
+error: the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro
   --> $DIR/macro-or-patterns-back-compat.rs:8:23
    |
 LL | macro_rules! bar { ($($x:pat)+ | $($y:pat)+) => {} }
    |                       ^^^^^^ help: use pat2015 to preserve semantics: `$x:pat2015`
 
-error: the meaning of the pat fragment specific is changing in Rust 2021, which may affect this macro
+error: the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro
   --> $DIR/macro-or-patterns-back-compat.rs:11:21
    |
 LL | macro_rules! ogg { ($x:pat | $y:pat2015) => {} }
    |                     ^^^^^^ help: use pat2015 to preserve semantics: `$x:pat2015`
 
-error: the meaning of the pat fragment specific is changing in Rust 2021, which may affect this macro
+error: the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro
   --> $DIR/macro-or-patterns-back-compat.rs:13:26
    |
 LL |     ( $expr:expr , $( $( $pat:pat )|+ => $expr_arm:expr ),+ ) => {