Add NEWS entry about IRB syntax highlight [ci skip]

Details: https://github.com/ruby/ruby/pull/2150

Note that this introduction is discussed with @aycabta who is allowed to
make some changes to IRB by the IRB maintainer, keiju.

1 files changed, 6 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 89565e7caf..4c8f4fe3a0 100644
--- a/NEWS
+++ b/NEWS
@@ -88,6 +88,12 @@ ERB::
 
   * Prohibit marshaling ERB instance.
 
+IRB::
+
+  * Syntax-highlight inspect output for some core-class objects
+
+  * Syntax-highlight binding.irb source lines
+
 Net::IMAP::
 
   * Add Server Name Indication (SNI) support.  [Feature #15594]