NEWS: Mention that optparse now supports did_you_mean for unknown option

1 files changed, 17 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index aadb1224c9..5d10fecec9 100644
--- a/NEWS
+++ b/NEWS
@@ -401,6 +401,23 @@ open-uri::
   * The default charset of text/* media type is UTF-8 instead of
     ISO-8859-1.  [Bug #15933]
 
+OptionParser::
+
+  * Now show "Did you mean?" for unknown option.  [Feature #16256]
+
+    require 'optparse'
+    OptionParser.new do |opts|
+      opts.on("-f", "--foo", "foo") {|v| }
+      opts.on("-b", "--bar", "bar") {|v| }
+      opts.on("-c", "--baz", "baz") {|v| }
+    end.parse!
+
+    $ ruby test.rb --baa
+    Traceback (most recent call last):
+    test.rb:7:in `<main>': invalid option: --baa (OptionParser::InvalidOption)
+    Did you mean?  baz
+                   bar
+
 Pathname::
 
   * Delegates 3 arguments from Pathname.glob to Dir.glob to