Why my CodeRunner mac app keep output “(B[m” before my correct output? When I code test ruby script, it keeps output "(B[m" before my other output, even thought I just have single line puts statement. 

Just as follow:



See the "(B[m" before my output text "      test". It's really annoying me for a long while. Any help will be preciated!



Update:

It occurs at CodeRunner version 1.3.1, and in latest version(2.2.1) I also get a "(B" there!
It looks like a language encoding issue.  Check that the space characters at the beginning of the string are actually half-width space, and not Japanese full-width spaces.