Coverage decreased (-0.03%) when pulling 59825c84f3da381a709ef7717e81910ed34e34e8 on obache:kill-bashizm into 355c72dcf9dfb8326d95023e2575a25f98f880e3 on saitoha:master.
@obache Thanks, I commited 18efc1c in a feature branch at 2 days ago of #15.
I should have checked it.
This fix will be merged soon and released with libsixel 1.4.2.
'=' operator for test(1) is not portable.