Update stderr files

And also fix some comments as suggested by lcnr

Author: JulianKnodt

src/test/ui/const-generics/apit-with-const-param.stderr

@@ -1,4 +1,4 @@
-// Tests that array sizes that depend on const-params does not yet work.
+// Tests that array sizes that depend on const-params are checked using `ConstEvaluatable`.
 // revisions: full min
 
 #![cfg_attr(full, feature(const_generics))]

src/test/ui/const-generics/array-size-in-generic-struct-param.rs

@@ -1,4 +1,4 @@
-// Checks whether conditions in traits can be evaluated.
+// Checks that `impl Trait<{anon_const}> for Type` evaluates successfully.
 // run-pass
 // revisions: full min
 

src/test/ui/const-generics/array-size-in-generic-struct-param.stderr

@@ -1,4 +1,3 @@
-// Check that const args in functions can be used.
 // run-pass
 // revisions: full min
 

src/test/ui/const-generics/broken-mir-1.stderr

@@ -1,6 +1,6 @@
 // run-pass
 // revisions: full
-// FIXME Omitted min revision for now due to ICE.
+// FIXME(#75323) Omitted min revision for now due to ICE.
 
 #![cfg_attr(full, feature(const_generics))]
 #![cfg_attr(full, allow(incomplete_features))]

src/test/ui/const-generics/broken-mir-2.stderr

@@ -1,4 +1,4 @@
-// Check `const fn` with const param is alright
+// Checks that `const fn` with const params can be used.
 // run-pass
 // revisions: full min