Add stable feature name

lopopolo · lopopolo · commit 18feaa3fa25f · 2020-03-10T18:45:08.000-07:00
diff --git a/src/liballoc/string.rs b/src/liballoc/string.rs
@@ -2225,7 +2225,7 @@ impl From<&str> for String {
     }
 }
 
-#[stable(feature = "???", since = "1.43.0")]
+#[stable(feature = "from_mut_str_for_string", since = "1.44.0")]
 impl From<&mut str> for String {
     #[inline]
     fn from(s: &mut str) -> String {

Original file line number	Diff line number	Diff line change
`@@ -2225,7 +2225,7 @@ impl From<&str> for String {`
`2225`	`2225`	`}`
`2226`	`2226`	`}`
`2227`	`2227`
`2228`		`-#[stable(feature = "???", since = "1.43.0")]`
	`2228`	`+#[stable(feature = "from_mut_str_for_string", since = "1.44.0")]`
`2229`	`2229`	`impl From<&mut str> for String {`
`2230`	`2230`	`#[inline]`
`2231`	`2231`	`fn from(s: &mut str) -> String {`