implement rfc 1054: split_whitespace() fn, deprecate words()

For now, words() is left in (but deprecated), and Words is a type alias for
struct SplitWhitespace.

Also cleaned up references to s.words() throughout codebase.

Closes #15628

1 files changed, 1 insertions, 2 deletions

diff --git a/src/libgetopts/lib.rs b/src/libgetopts/lib.rs
index 197199e743f..5782c57834e 100644
--- a/src/libgetopts/lib.rs
+++ b/src/libgetopts/lib.rs
@@ -91,7 +91,6 @@
 
 #![deny(missing_docs)]
 #![feature(staged_api)]
-#![feature(str_words)]
 #![feature(str_char)]
 #![cfg_attr(test, feature(rustc_private))]
 
@@ -771,7 +770,7 @@ pub fn usage(brief: &str, opts: &[OptGroup]) -> String {
 
         // Normalize desc to contain words separated by one space character
         let mut desc_normalized_whitespace = String::new();
-        for word in desc.words() {
+        for word in desc.split_whitespace() {
             desc_normalized_whitespace.push_str(word);
             desc_normalized_whitespace.push(' ');
         }