Fix typos in error.rs

Author: BO41

src/libstd/error.rs

@@ -269,8 +269,8 @@ impl<'a, E: Error + 'a> From<E> for Box<dyn Error + 'a> {
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, E: Error + Send + Sync + 'a> From<E> for Box<dyn Error + Send + Sync + 'a> {
-    /// Converts a type of [`Error`] + [`trait@Send`] + [`trait@Sync`] into a box of
-    /// dyn [`Error`] + [`trait@Send`] + [`trait@Sync`].
+    /// Converts a type of [`Error`] + [`Send`] + [`Sync`] into a box of
+    /// dyn [`Error`] + [`Send`] + [`Sync`].
     ///
     /// [`Error`]: ../error/trait.Error.html
     ///
@@ -313,7 +313,7 @@ impl<'a, E: Error + Send + Sync + 'a> From<E> for Box<dyn Error + Send + Sync +
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl From<String> for Box<dyn Error + Send + Sync> {
-    /// Converts a [`String`] into a box of dyn [`Error`] + [`trait@Send`] + [`trait@Sync`].
+    /// Converts a [`String`] into a box of dyn [`Error`] + [`Send`] + [`Sync`].
     ///
     /// [`Error`]: ../error/trait.Error.html
     ///
@@ -377,7 +377,7 @@ impl From<String> for Box<dyn Error> {
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a> From<&str> for Box<dyn Error + Send + Sync + 'a> {
-    /// Converts a [`str`] into a box of dyn [`Error`] + [`trait@Send`] + [`trait@Sync`].
+    /// Converts a [`str`] into a box of dyn [`Error`] + [`Send`] + [`Sync`].
     ///
     /// [`Error`]: ../error/trait.Error.html
     ///
@@ -420,7 +420,7 @@ impl From<&str> for Box<dyn Error> {
 
 #[stable(feature = "cow_box_error", since = "1.22.0")]
 impl<'a, 'b> From<Cow<'b, str>> for Box<dyn Error + Send + Sync + 'a> {
-    /// Converts a [`Cow`] into a box of dyn [`Error`] + [`trait@Send`] + [`trait@Sync`].
+    /// Converts a [`Cow`] into a box of dyn [`Error`] + [`Send`] + [`Sync`].
     ///
     /// [`Cow`]: ../borrow/enum.Cow.html
     /// [`Error`]: ../error/trait.Error.html