Do our best to restore tab characters

[Dieken]

$ echo -e 'abc\t\t\tabc'
  # use mouse to select and copy the output, it should contain three tabs,
  # not expand to spaces.

$ touch 2024中华人民共和国
$ for i in `seq 1 20`; do touch text-text-text-text-text-text-$i; done 
$ gls
$ gls -C | cat
  # It should align correctly.

[Sbozzolo]

Does this assume that any 8 consecutive spaces are always a tab?

[Dieken]

Does this assume that any 8 consecutive spaces are always a tab?

No, consecutive empty cells reaching tab stop are converted to tab. Notice it doesn't have to be consecutive 8 empty cells.

Empty cell means cell.chars[0] == 0, not cell.chars[0] == ' '. Currently the master branch code converts each empty cell to a space, this is very bad, produces wrong output for copy & paste, and doesn't align text well.

[Dieken]

@Sbozzolo @jixiuf could you merge this?