docs: Update deprecation messages

- Some still referenced the clapng issue number
- Some YAML ones were missed in the formatting clean up
- I never updated the usage ones with the formatting clean up

src/build/app/mod.rs

@@ -2331,7 +2331,7 @@ impl<'help> App<'help> {
     #[cfg(feature = "yaml")]
     #[deprecated(
         since = "3.0.0",
-        note = "Maybe clap::Parser would fit your use case? (Issue #9)"
+        note = "Deprecated in Issue #3087, maybe clap::Parser would fit your use case?"
     )]
     pub fn from_yaml(y: &'help Yaml) -> Self {
         #![allow(deprecated)]
@@ -2495,14 +2495,14 @@ impl<'help> App<'help> {
     }
 
     /// Deprecated in [Issue #3086](https://github.com/clap-rs/clap/issues/3086), see [`arg!`][crate::arg!].
-    #[deprecated(since = "3.0.0", note = "Replaced with `arg!`")]
+    #[deprecated(since = "3.0.0", note = "Deprecated in Issue #3086, see `clap::arg!")]
     pub fn arg_from_usage(self, usage: &'help str) -> Self {
         #![allow(deprecated)]
         self.arg(Arg::from_usage(usage))
     }
 
     /// Deprecated in [Issue #3086](https://github.com/clap-rs/clap/issues/3086), see [`arg!`][crate::arg!].
-    #[deprecated(since = "3.0.0", note = "Replaced with `arg!`")]
+    #[deprecated(since = "3.0.0", note = "Deprecated in Issue #3086, see `clap::arg!")]
     pub fn args_from_usage(mut self, usage: &'help str) -> Self {
         #![allow(deprecated)]
         for line in usage.lines() {

src/build/arg/mod.rs

@@ -4609,7 +4609,7 @@ impl<'help> Arg<'help> {
     #[cfg(feature = "yaml")]
     #[deprecated(
         since = "3.0.0",
-        note = "Maybe clap::Parser would fit your use case? (Issue #9)"
+        note = "Deprecated in Issue #3087, maybe clap::Parser would fit your use case?"
     )]
     pub fn from_yaml(y: &'help Yaml) -> Self {
         #![allow(deprecated)]
@@ -4679,7 +4679,7 @@ impl<'help> Arg<'help> {
     }
 
     /// Deprecated in [Issue #3086](https://github.com/clap-rs/clap/issues/3086), see [`arg!`][crate::arg!].
-    #[deprecated(since = "3.0.0", note = "Replaced with `arg!`")]
+    #[deprecated(since = "3.0.0", note = "Deprecated in Issue #3086, see `clap::arg!")]
     pub fn from_usage(u: &'help str) -> Self {
         UsageParser::from_usage(u).parse()
     }

src/build/arg_group.rs

@@ -442,7 +442,7 @@ impl<'help> ArgGroup<'help> {
     #[cfg(feature = "yaml")]
     #[deprecated(
         since = "3.0.0",
-        note = "Maybe clap::Parser would fit your use case? (Issue #9)"
+        note = "Maybe clap::Parser would fit your use case? (Issue #3087)"
     )]
     pub fn from_yaml(yaml: &'help Yaml) -> Self {
         Self::from(yaml)

src/lib.rs

@@ -39,7 +39,7 @@ pub use crate::derive::{ArgEnum, Args, FromArgMatches, IntoApp, Parser, Subcomma
 #[doc(hidden)]
 #[deprecated(
     since = "3.0.0",
-    note = "Deprecated in Issue #9, maybe clap::Parser would fit your use case?"
+    note = "Deprecated in Issue #3087, maybe clap::Parser would fit your use case?"
 )]
 pub use yaml_rust::YamlLoader;
 
@@ -91,7 +91,7 @@ impl SubCommand {
     #[cfg(feature = "yaml")]
     #[deprecated(
         since = "3.0.0",
-        note = "Deprecated in Issue #9, maybe clap::Parser would fit your use case?"
+        note = "Deprecated in Issue #3087, maybe clap::Parser would fit your use case?"
     )]
     pub fn from_yaml(yaml: &yaml_rust::Yaml) -> App {
         #![allow(deprecated)]

src/macros.rs

@@ -2,7 +2,7 @@
 #[cfg(feature = "yaml")]
 #[deprecated(
     since = "3.0.0",
-    note = "Deprecated in Issue #9, maybe clap::Parser would fit your use case?"
+    note = "Deprecated in Issue #3087, maybe clap::Parser would fit your use case?"
 )]
 #[macro_export]
 macro_rules! load_yaml {