Reword descriptions of soft feature gate tests

Author: fmease

tests/ui/feature-gates/soft-feature-gate-auto_traits.rs

@@ -1,6 +1,6 @@
-// For historical reasons, auto traits don't have a proper pre-expansion feature gate.
-// We're now at least issuing a *warning* for those that only exist before macro expansion.
-// FIXME(#154045): Turn their post-expansion feature gate into a proper pre-expansion one.
+// For historical reasons, auto traits don't have an erroring pre-expansion feature gate.
+// We're now at least issuing a warning for those that only exist before macro expansion.
+// FIXME(#154045): Turn this pre-expansion warning into an error and remove the post-expansion gate.
 //                 As part of this, move these test cases into `feature-gate-auto-traits.rs`.
 //@ check-pass
 

tests/ui/feature-gates/soft-feature-gate-box_patterns.rs

@@ -1,6 +1,6 @@
-// For historical reasons, box patterns don't have a proper pre-expansion feature gate.
-// We're now at least issuing a *warning* for those that only exist before macro expansion.
-// FIXME(#154045): Turn their post-expansion feature gate into a proper pre-expansion one.
+// For historical reasons, box patterns don't have an erroring pre-expansion feature gate.
+// We're now at least issuing a warning for those that only exist before macro expansion.
+// FIXME(#154045): Turn this pre-expansion warning into an error and remove the post-expansion gate.
 //                 As part of this, move these test cases into `feature-gate-box_patterns.rs`.
 //@ check-pass
 

tests/ui/feature-gates/soft-feature-gate-decl_macro.rs

@@ -1,6 +1,6 @@
-// For historical reasons, decl macros 2.0 don't have a proper pre-expansion feature gate.
-// We're now at least issuing a *warning* for those that only exist before macro expansion.
-// FIXME(#154045): Turn their post-expansion feature gate into a proper pre-expansion one.
+// For historical reasons, decl macros 2.0 don't have an erroring pre-expansion feature gate.
+// We're now at least issuing a warning for those that only exist before macro expansion.
+// FIXME(#154045): Turn this pre-expansion warning into an error and remove the post-expansion gate.
 //                 As part of this, move these test cases into `feature-gate-decl_macro.rs`.
 //@ check-pass
 

tests/ui/feature-gates/soft-feature-gate-negative_impls.rs

@@ -1,6 +1,6 @@
-// For historical reasons, negative impls don't have a proper pre-expansion feature gate.
-// We're now at least issuing a *warning* for those that only exist before macro expansion.
-// FIXME(#154045): Turn their post-expansion feature gate into a proper pre-expansion one.
+// For historical reasons, negative impls don't have an erroring pre-expansion feature gate.
+// We're now at least issuing a warning for those that only exist before macro expansion.
+// FIXME(#154045): Turn this pre-expansion warning into an error and remove the post-expansion gate.
 //                 As part of this, move these test cases into `feature-gate-negative_impls.rs`.
 //@ check-pass
 

tests/ui/feature-gates/soft-feature-gate-trait_alias.rs

@@ -1,6 +1,6 @@
-// For historical reasons, trait aliases don't have a proper pre-expansion feature gate.
-// We're now at least issuing a *warning* for those that only exist before macro expansion.
-// FIXME(#154045): Turn their post-expansion feature gate into a proper pre-expansion one.
+// For historical reasons, trait aliases don't have an erroring pre-expansion feature gate.
+// We're now at least issuing a warning for those that only exist before macro expansion.
+// FIXME(#154045): Turn this pre-expansion warning into an error and remove the post-expansion gate.
 //                 As part of this, move these test cases into `feature-gate-trait-alias.rs`.
 //@ check-pass
 

tests/ui/feature-gates/soft-feature-gate-try_blocks.rs

@@ -1,6 +1,6 @@
-// For historical reasons, try blocks don't have a proper pre-expansion feature gate.
-// We're now at least issuing a *warning* for those that only exist before macro expansion.
-// FIXME(#154045): Turn their post-expansion feature gate into a proper pre-expansion one.
+// For historical reasons, try blocks don't have an erroring pre-expansion feature gate.
+// We're now at least issuing a warning for those that only exist before macro expansion.
+// FIXME(#154045): Turn this pre-expansion warning into an error and remove the post-expansion gate.
 //                 As part of this, move these test cases into `feature-gate-try_blocks.rs`.
 //@ edition: 2018
 //@ check-pass

tests/ui/specialization/soft-feature-gate-specialization.rs

@@ -1,6 +1,6 @@
 // For historical reasons, item modifier `default` doesn't have a proper pre-expansion feature gate.
-// We're now at least issuing a *warning* for those that only exist before macro expansion.
-// FIXME(#154045): Turn their post-expansion feature gate into a proper pre-expansion one.
+// We're now at least issuing a warning for those that only exist before macro expansion.
+// FIXME(#154045): Turn this pre-expansion warning into an error and remove the post-expansion gate.
 //                 As part of this, move these test cases into `feature-gate-specialization.rs`.
 //
 // Moreover, `specialization` implies `min_specialization` similar to the post-expansion gate.