refactor(build-rs): Clarify MSRV policy being added

Author: epage

crates/build-rs/src/lib.rs

@@ -26,7 +26,7 @@ macro_rules! unstable {
     };
 }
 
-macro_rules! msrv {
+macro_rules! respected_msrv {
     ($ver:literal) => {
         concat!("> MSRV: Respected as of ", $ver, ".")
     };

crates/build-rs/src/output.rs

@@ -301,7 +301,7 @@ pub fn rustc_cfg_value(key: &str, value: &str) {
 /// and other mistakes.
 ///
 /// [`unexpected_cfgs`]: https://doc.rust-lang.org/rustc/lints/listing/warn-by-default.html#unexpected-cfgs
-#[doc = msrv!("1.80")]
+#[doc = respected_msrv!("1.80")]
 #[track_caller]
 pub fn rustc_check_cfgs(keys: &[&str]) {
     if keys.is_empty() {
@@ -332,7 +332,7 @@ pub fn rustc_check_cfgs(keys: &[&str]) {
 /// and other mistakes.
 ///
 /// [`unexpected_cfgs`]: https://doc.rust-lang.org/rustc/lints/listing/warn-by-default.html#unexpected-cfgs
-#[doc = msrv!("1.80")]
+#[doc = respected_msrv!("1.80")]
 #[track_caller]
 pub fn rustc_check_cfg_values(key: &str, values: &[&str]) {
     if !is_ident(key) {