diff --git a/src/de.rs b/src/de.rs
index df49d0c..b762449 100644
--- a/src/de.rs
+++ b/src/de.rs
@@ -951,7 +951,7 @@ impl Flags {
     /// - `target.<triple>.rustflags`
     /// - `target.<cfg>.rustflags`
     /// - `build.rustflags`
-    /// - `target.<triple>.rustdocflags`
+    /// - `target.<triple>.rustdocflags` (Cargo 1.78+)
     /// - `build.rustdocflags`
     ///
     /// See also `encode_space_separated`.
diff --git a/src/easy.rs b/src/easy.rs
index 83442ab..63b3120 100644
--- a/src/easy.rs
+++ b/src/easy.rs
@@ -1072,7 +1072,7 @@ impl Flags {
     /// - `target.<triple>.rustflags`
     /// - `target.<cfg>.rustflags`
     /// - `build.rustflags`
-    /// - `target.<triple>.rustdocflags`
+    /// - `target.<triple>.rustdocflags` (Cargo 1.78+)
     /// - `build.rustdocflags`
     ///
     /// See also [`encode_space_separated`](Self::encode_space_separated).
@@ -1120,7 +1120,7 @@ impl Flags {
     /// - `target.<triple>.rustflags`
     /// - `target.<cfg>.rustflags`
     /// - `build.rustflags`
-    /// - `target.<triple>.rustdocflags`
+    /// - `target.<triple>.rustdocflags` (Cargo 1.78+)
     /// - `build.rustdocflags`
     ///
     /// # Errors
diff --git a/src/value.rs b/src/value.rs
index 7e685d7..dbb262c 100644
--- a/src/value.rs
+++ b/src/value.rs
@@ -84,7 +84,7 @@ impl Definition {
         }
     }
 
-    // /// Returns true if self is a higher priority to other.
+    // /// Returns `true` if self is a higher priority to other.
     // ///
     // /// CLI is preferred over environment, which is preferred over files.
     // pub(crate) fn is_higher_priority(&self, other: &Definition) -> bool {