Rollup merge of rust-lang#31090 - tshepang:improve-sentence, r=brson

Author: steveklabnik

src/libstd/fs.rs

@@ -487,8 +487,8 @@ impl OpenOptions {
     /// This option indicates whether a new file will be created if the file
     /// does not yet already exist.
     ///
-    /// The file must be opened with write or append access in order to create
-    /// a new file.
+    /// In order for the file to be created, `write` or `append` access must
+    /// be used.
     ///
     /// # Examples
     ///