output is interleaved with blank lines when passing multiple file arguments (e.g.: *.txt)

[fferri]

Description

When passing multiple file arguments, e.g.:

colorls a.txt b.txt c.txt

or

colorls *.txt

the output is interleaved with blank lines:

$ colorls *.txt
      a.txt

      b.txt

      c.txt

      d.txt

For comparison, this is the normal output:

$ colorls
      a.txt       b.txt       c.txt       d.txt

and this is the long (-l) output:

$ colorls -l
  rw-r--r--  me  staff    0 B    Mon Oct 29 17:52:05 2018    a.txt
  rw-r--r--  me  staff    0 B    Mon Oct 29 17:52:05 2018    b.txt
  rw-r--r--  me  staff    0 B    Mon Oct 29 17:52:05 2018    c.txt
  rw-r--r--  me  staff    0 B    Mon Oct 29 17:52:05 2018    d.txt

• Relevant Issues : (none)
• Relevant PRs : (none)
• Type of issue :
  • Installation
  • Font-related
  • Feature request
  • Bug in existing feature
  • Developer mode : Code quality / Tests / Documentation

[t-mangoe]

I investigated this blank line.
In lib/colorls/flags.rb, the following output statement seems to make blank lines in process method.
puts '' if i.positive?
(line number is 46)