convert unused doc comments to regular comments

src/cargo/core/features.rs

@@ -150,17 +150,17 @@ macro_rules! stab {
     };
 }
 
-/// A listing of all features in Cargo
-///
-/// "look here"
-///
-/// This is the macro that lists all stable and unstable features in Cargo.
-/// You'll want to add to this macro whenever you add a feature to Cargo, also
-/// following the directions above.
-///
-/// Note that all feature names here are valid Rust identifiers, but the `_`
-/// character is translated to `-` when specified in the `cargo-features`
-/// manifest entry in `Cargo.toml`.
+// A listing of all features in Cargo.
+//
+// "look here"
+//
+// This is the macro that lists all stable and unstable features in Cargo.
+// You'll want to add to this macro whenever you add a feature to Cargo, also
+// following the directions above.
+//
+// Note that all feature names here are valid Rust identifiers, but the `_`
+// character is translated to `-` when specified in the `cargo-features`
+// manifest entry in `Cargo.toml`.
 features! {
     pub struct Features {
 

tests/testsuite/resolve.rs

@@ -14,13 +14,13 @@ use crate::support::resolver::{
 
 use proptest::{prelude::*, *};
 
-/// NOTE: proptest is a form of fuzz testing. It generates random input and makes sure that
-/// certain universal truths are upheld. Therefore, it can pass when there is a problem,
-/// but if it fails then there really is something wrong. When testing something as
-/// complicated as the resolver, the problems can be very subtle and hard to generate.
-/// We have had a history of these tests only failing on PRs long after a bug is introduced.
-/// If you have one of these test fail please report it on #6258,
-/// and if you did not change the resolver then feel free to retry without concern.
+// NOTE: proptest is a form of fuzz testing. It generates random input and makes sure that
+// certain universal truths are upheld. Therefore, it can pass when there is a problem,
+// but if it fails then there really is something wrong. When testing something as
+// complicated as the resolver, the problems can be very subtle and hard to generate.
+// We have had a history of these tests only failing on PRs long after a bug is introduced.
+// If you have one of these test fail please report it on #6258,
+// and if you did not change the resolver then feel free to retry without concern.
 proptest! {
     #![proptest_config(ProptestConfig {
         max_shrink_iters: