Stabilize String::replace_range

Fixes rust-lang#44643

src/liballoc/string.rs

@@ -1517,7 +1517,7 @@ impl String {
         }
     }
 
-    /// Creates a splicing iterator that removes the specified range in the string,
+    /// Removes the specified range in the string,
     /// and replaces it with the given string.
     /// The given string doesn't need to be the same length as the range.
     ///
@@ -1537,21 +1537,20 @@ impl String {
     /// Basic usage:
     ///
     /// ```
-    /// #![feature(splice)]
     /// let mut s = String::from("α is alpha, β is beta");
     /// let beta_offset = s.find('β').unwrap_or(s.len());
     ///
     /// // Replace the range up until the β from the string
-    /// s.splice(..beta_offset, "Α is capital alpha; ");
+    /// s.replace_range(..beta_offset, "Α is capital alpha; ");
     /// assert_eq!(s, "Α is capital alpha; β is beta");
     /// ```
-    #[unstable(feature = "splice", reason = "recently added", issue = "44643")]
-    pub fn splice<R>(&mut self, range: R, replace_with: &str)
+    #[stable(feature = "splice", since = "1.27.0")]
+    pub fn replace_range<R>(&mut self, range: R, replace_with: &str)
         where R: RangeBounds<usize>
     {
         // Memory safety
         //
-        // The String version of Splice does not have the memory safety issues
+        // Replace_range does not have the memory safety issues of a vector Splice.
         // of the vector version. The data is just plain bytes.
 
         match range.start() {

src/liballoc/tests/string.rs

@@ -443,53 +443,53 @@ fn test_drain() {
 }
 
 #[test]
-fn test_splice() {
+fn test_replace_range() {
     let mut s = "Hello, world!".to_owned();
-    s.splice(7..12, "世界");
+    s.replace_range(7..12, "世界");
     assert_eq!(s, "Hello, 世界!");
 }
 
 #[test]
 #[should_panic]
-fn test_splice_char_boundary() {
+fn test_replace_range_char_boundary() {
     let mut s = "Hello, 世界!".to_owned();
-    s.splice(..8, "");
+    s.replace_range(..8, "");
 }
 
 #[test]
-fn test_splice_inclusive_range() {
+fn test_replace_range_inclusive_range() {
     let mut v = String::from("12345");
-    v.splice(2..=3, "789");
+    v.replace_range(2..=3, "789");
     assert_eq!(v, "127895");
-    v.splice(1..=2, "A");
+    v.replace_range(1..=2, "A");
     assert_eq!(v, "1A895");
 }
 
 #[test]
 #[should_panic]
-fn test_splice_out_of_bounds() {
+fn test_replace_range_out_of_bounds() {
     let mut s = String::from("12345");
-    s.splice(5..6, "789");
+    s.replace_range(5..6, "789");
 }
 
 #[test]
 #[should_panic]
-fn test_splice_inclusive_out_of_bounds() {
+fn test_replace_range_inclusive_out_of_bounds() {
     let mut s = String::from("12345");
-    s.splice(5..=5, "789");
+    s.replace_range(5..=5, "789");
 }
 
 #[test]
-fn test_splice_empty() {
+fn test_replace_range_empty() {
     let mut s = String::from("12345");
-    s.splice(1..2, "");
+    s.replace_range(1..2, "");
     assert_eq!(s, "1345");
 }
 
 #[test]
-fn test_splice_unbounded() {
+fn test_replace_range_unbounded() {
     let mut s = String::from("12345");
-    s.splice(.., "");
+    s.replace_range(.., "");
     assert_eq!(s, "");
 }