Summary This following is a behavior from CRuby 1.8.7 to 3.1.0. % ruby -ve "p ['a', 'b', 'c']*''" ruby 1.8.7 (2013-12-22 patchlevel 375) [i686-darwin13.0.2] "abc" % ruby -ve "p ['a', 'b', 'c']*''"...