Update stability attribute for double ended case mapping iterators

dtolnay · dtolnay · commit 417b6f354e98 · 2021-12-22T10:49:51.000-08:00
diff --git a/library/core/src/char/mod.rs b/library/core/src/char/mod.rs
@@ -393,7 +393,7 @@ impl Iterator for ToLowercase {
     }
 }
 
-#[stable(feature = "rust1", since = "1.0.0")]
+#[stable(feature = "case_mapping_double_ended", since = "1.59.0")]
 impl DoubleEndedIterator for ToLowercase {
     fn next_back(&mut self) -> Option<char> {
         self.0.next_back()
@@ -427,7 +427,7 @@ impl Iterator for ToUppercase {
     }
 }
 
-#[stable(feature = "rust1", since = "1.0.0")]
+#[stable(feature = "case_mapping_double_ended", since = "1.59.0")]
 impl DoubleEndedIterator for ToUppercase {
     fn next_back(&mut self) -> Option<char> {
         self.0.next_back()

Original file line number	Diff line number	Diff line change
`@@ -393,7 +393,7 @@ impl Iterator for ToLowercase {`
`393`	`393`	`}`
`394`	`394`	`}`
`395`	`395`
`396`		`-#[stable(feature = "rust1", since = "1.0.0")]`
	`396`	`+#[stable(feature = "case_mapping_double_ended", since = "1.59.0")]`
`397`	`397`	`impl DoubleEndedIterator for ToLowercase {`
`398`	`398`	`fn next_back(&mut self) -> Option<char> {`
`399`	`399`	`self.0.next_back()`
`@@ -427,7 +427,7 @@ impl Iterator for ToUppercase {`
`427`	`427`	`}`
`428`	`428`	`}`
`429`	`429`
`430`		`-#[stable(feature = "rust1", since = "1.0.0")]`
	`430`	`+#[stable(feature = "case_mapping_double_ended", since = "1.59.0")]`
`431`	`431`	`impl DoubleEndedIterator for ToUppercase {`
`432`	`432`	`fn next_back(&mut self) -> Option<char> {`
`433`	`433`	`self.0.next_back()`