Rename CreateDirOptions to DirBuilder

text/0000-io-fs-2.1.md

@@ -324,9 +324,9 @@ permission bits on unix or security attributes on Windows. This RFC proposes
 adding the following API to `std::fs`:
 
 ```rust
-pub struct CreateDirOptions { ... }
+pub struct DirBuilder { ... }
 
-impl CreateDirOptions {
+impl DirBuilder {
     /// Creates a new set of options with default mode/security settings for all
     /// platforms and also non-recursive.
     pub fn new() -> Self;
@@ -342,18 +342,18 @@ impl CreateDirOptions {
 }
 
 mod os::unix::fs {
-    pub trait CreateDirOptionsExt {
+    pub trait DirBuilderExt {
         fn mode(&mut self, mode: raw::mode_t) -> &mut Self;
     }
-    impl CreateDirOptionsExt for CreateDirOptions { ... }
+    impl DirBuilderExt for DirBuilder { ... }
 }
 
 mod os::windows::fs {
     // once a `SECURITY_ATTRIBUTES` abstraction exists, this will be added
-    pub trait CreateDirOptionsExt {
+    pub trait DirBuilderExt {
         fn security_attributes(&mut self, ...) -> &mut Self;
     }
-    impl CreateDirOptionsExt for CreateDirOptions { ... }
+    impl DirBuilderExt for DirBuilder { ... }
 }
 ```
 
@@ -373,7 +373,7 @@ pub fn template<P: AsRef<Path>>(&mut self, path: P) -> &mut Self;
 ```
 
 At this time, however, it it not proposed to add this method to
-`CreateDirOptions`.
+`DirBuilder`.
 
 ## Adding `FileType`