[ruby-cvs:78283] 6723aa07e5 (master): Change argument `Proc` to `#call` defined object.

manga_osyo	2019-11-20 09:13:42 +0900 (Wed, 20 Nov 2019)

  New Revision: 6723aa07e5

  https://github.com/ruby/ruby/commit/6723aa07e5

  Log:
    Change argument `Proc` to `#call` defined object.
    This is the same as the behavior of Readline.

  Modified files:
    lib/reline.rb
    test/reline/test_reline.rb