git-ref-format: Component::from_refstr

Improve Component::from_refstring by redefining it as
Component::from_refstr. This allows the use of `RefStr` or `RefString`
instead of just RefString.

Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett

git-ref-format/core/src/name/iter.rs

@@ -9,7 +9,7 @@ use std::{
     ops::Deref,
 };
 
-use super::{RefStr, RefString};
+use super::RefStr;
 use crate::lit;
 
 pub type Iter<'a> = std::str::Split<'a, char>;
@@ -52,9 +52,10 @@ pub struct Component<'a>(Cow<'a, RefStr>);
 
 impl<'a> Component<'a> {
     #[inline]
-    pub fn from_refstring(r: RefString) -> Option<Self> {
+    pub fn from_refstr(r: impl Into<Cow<'a, RefStr>>) -> Option<Self> {
+        let r = r.into();
         if !r.contains('/') {
-            Some(Self(Cow::Owned(r)))
+            Some(Self(r))
         } else {
             None
         }