Remove space and rephrase map() advice.

clippy_lints/src/unnecessary_map_on_constructor.rs

@@ -13,8 +13,8 @@ declare_clippy_lint! {
     /// is being constructed.
     ///
     /// ### Why is this bad?
-    /// It introduces unnecessary complexity. In this case the function can be used directly and
-    /// construct the `Option` or `Result` from the output.
+    /// It introduces unnecessary complexity. Instead, the function can be called before
+    /// constructing the `Option` or `Result` from its return value.
     ///
     /// ### Example
     /// ```no_run