Do some light copyediting

We fixed one subject-verb agreement, clarified a couple sentences
slightly, and replaced commas with semicolons in a list where the
latter make a bit more sense.

src/rust-2024/cargo-remove-implicit-features.md

@@ -31,7 +31,7 @@ graphics = ["dep:jpeg-decoder"]
 
 ### Motivation
 
-A reason for requiring this to be explicit is that it encourages a conscious decision about the public exposure of the feature name, and makes it clearer when reading the `[features]` table which features exist.
+One reason for requiring this to be explicit is that it encourages a conscious decision about the public exposure of the feature name, and makes it clearer when reading the `[features]` table which features exist.
 This can help avoid tying the implementation details (the dependency names) to the public set of feature names.
 
 Also, removing features is a [SemVer incompatible change][semver], which may not be obvious when removing an optional dependency that you thought was private.

src/rust-2024/cargo-table-key-names.md

@@ -4,13 +4,13 @@
 
 ## Summary
 
-- Several table and key names in `Cargo.toml` have been removed where there was previously two ways to specify it.
-    - Removed `[project]`, use `[package]` instead.
-    - Removed `default_features`, use `default-features` instead.
-    - Removed `crate_type`, use `crate-type` instead.
-    - Removed `proc_macro`, use `proc-macro` instead.
-    - Removed `dev_dependencies`, use `dev-dependencies` instead.
-    - Removed `build_dependencies`, use `build-dependencies` instead.
+- Several table and key names in `Cargo.toml` have been removed where there were previously two ways to specify the same thing.
+    - Removed `[project]`; use `[package]` instead.
+    - Removed `default_features`; use `default-features` instead.
+    - Removed `crate_type`; use `crate-type` instead.
+    - Removed `proc_macro`; use `proc-macro` instead.
+    - Removed `dev_dependencies`; use `dev-dependencies` instead.
+    - Removed `build_dependencies`; use `build-dependencies` instead.
 
 ## Details