collect.rs: remove empty line after doc comment

library/core/src/fmt/mod.rs

@@ -854,7 +854,6 @@ impl Display for Arguments<'_> {
 /// }";
 /// assert_eq!(format!("The origin is: {origin:#?}"), expected);
 /// ```
-
 #[stable(feature = "rust1", since = "1.0.0")]
 #[rustc_on_unimplemented(
     on(

library/core/src/iter/traits/collect.rs

@@ -436,7 +436,6 @@ pub trait Extend<A> {
     /// **For implementors:** For a collection to unsafely rely on this method's safety precondition (that is,
     /// invoke UB if they are violated), it must implement `extend_reserve` correctly. In other words,
     /// callers may assume that if they `extend_reserve`ed enough space they can call this method.
-
     // This method is for internal usage only. It is only on the trait because of specialization's limitations.
     #[unstable(feature = "extend_one_unchecked", issue = "none")]
     #[doc(hidden)]

library/core/src/lib.rs

@@ -39,9 +39,9 @@
 //!   return. You should mark your implementation using `#[panic_handler]`.
 //!
 //! * `rust_eh_personality` - is used by the failure mechanisms of the
-//!    compiler. This is often mapped to GCC's personality function, but crates
-//!    which do not trigger a panic can be assured that this function is never
-//!    called. The `lang` attribute is called `eh_personality`.
+//!   compiler. This is often mapped to GCC's personality function, but crates
+//!   which do not trigger a panic can be assured that this function is never
+//!   called. The `lang` attribute is called `eh_personality`.
 
 #![stable(feature = "core", since = "1.6.0")]
 #![doc(

library/core/src/net/ip_addr.rs

@@ -787,7 +787,6 @@ impl Ipv4Addr {
     /// [IANA IPv4 Special-Purpose Address Registry]: https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml
     /// [unspecified address]: Ipv4Addr::UNSPECIFIED
     /// [broadcast address]: Ipv4Addr::BROADCAST
-
     ///
     /// # Examples
     ///

library/core/src/primitive_docs.rs

@@ -1365,7 +1365,6 @@ mod prim_f16 {}
 /// x = a + b + c + d; // As written
 /// x = (a + c) + (b + d); // Reordered to shorten critical path and enable vectorization
 /// ```
-
 #[stable(feature = "rust1", since = "1.0.0")]
 mod prim_f32 {}
 

library/core/src/str/mod.rs

@@ -2648,7 +2648,6 @@ impl str {
     /// you're trying to parse into.
     ///
     /// `parse` can parse into any type that implements the [`FromStr`] trait.
-
     ///
     /// # Errors
     ///