NEWS.md: converted from NEWS

and NEWS is deleted

.document

@@ -25,7 +25,7 @@ lib
 ext
 
 # rdoc files
-NEWS
+NEWS.md
 
 README.md
 README.ja.md

NEWS → NEWS.md

-# -*- rdoc -*-
-
-= NEWS for Ruby 2.8.0 (tentative; to be 3.0.0)
+# NEWS for Ruby 2.8.0 (tentative; to be 3.0.0)
 
 This document is a list of user visible feature changes made between
 releases except for bug fixes.
@@ -8,15 +6,15 @@ releases except for bug fixes.
 Note that each entry is kept so brief that no reason behind or reference
 information is supplied with.  For a full list of changes with all
 sufficient information, see the ChangeLog file or Redmine
-(e.g. <tt>https://bugs.ruby-lang.org/issues/$FEATURE_OR_BUG_NUMBER</tt>).
+(e.g. `https://bugs.ruby-lang.org/issues/$FEATURE_OR_BUG_NUMBER`).
 
-== Changes since the 2.7.0 release
+## Changes since the 2.7.0 release
 
-=== Language changes
+### Language changes
 
-=== Command line options
+### Command line options
 
-=== Core classes updates (outstanding ones only)
+### Core classes updates (outstanding ones only)
 
 Hash::
 
@@ -24,14 +22,14 @@ Hash::
 
     * Hash#transform_keys now accepts a hash that maps keys to new keys.  [Feature #16274]
 
-=== Stdlib updates (outstanding ones only)
+### Stdlib updates (outstanding ones only)
 
-=== Compatibility issues (excluding feature bug fixes)
+### Compatibility issues (excluding feature bug fixes)
 
-=== Stdlib compatibility issues (excluding feature bug fixes)
+### Stdlib compatibility issues (excluding feature bug fixes)
 
-=== C API updates
+### C API updates
 
-=== Implementation improvements
+### Implementation improvements
 
-=== Miscellaneous changes
+### Miscellaneous changes