[DOC] Fix indent [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64442 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

NEWS

@@ -105,8 +105,7 @@ with all sufficient information, see the ChangeLog file or Redmine
   * incompatible changes:
     * system() and exec() do not close non-standard file descriptors
       (The default of :close_others option is changed to false by default.
-       but we still set the FD_CLOEXEC flag on descriptors we create)
-      [Misc #14907]
+      but we still set the FD_CLOEXEC flag on descriptors we create) [Misc #14907]
 
 * KeyError