Add some doc aliases
Add `mkdir` to `create_dir`, `rmdir` to `remove_dir`.
diff --git a/library/std/src/fs.rs b/library/std/src/fs.rs
index bbe1ab4..f72f88b 100644
--- a/library/std/src/fs.rs
+++ b/library/std/src/fs.rs
@@ -1912,6 +1912,7 @@ pub fn canonicalize<P: AsRef<Path>>(path: P) -> io::Result<PathBuf> {
/// Ok(())
/// }
/// ```
+#[doc(alias = "mkdir")]
#[stable(feature = "rust1", since = "1.0.0")]
pub fn create_dir<P: AsRef<Path>>(path: P) -> io::Result<()> {
DirBuilder::new().create(path.as_ref())
@@ -1991,6 +1992,7 @@ pub fn create_dir_all<P: AsRef<Path>>(path: P) -> io::Result<()> {
/// Ok(())
/// }
/// ```
+#[doc(alias = "rmdir")]
#[stable(feature = "rust1", since = "1.0.0")]
pub fn remove_dir<P: AsRef<Path>>(path: P) -> io::Result<()> {
fs_imp::rmdir(path.as_ref())
