One problem with -w2 is if the file is >= 100 lines it breaks:

$ nl -w2 -s'. ' ...

98. 
99. 
00. 
01. 
02. 

$ nl -nrz -w2 -s'. ' ...

98. 
99. 
00. 
01. 
02. 

> On Mar 30, 2019, at 3:04 AM, Christopher Stone <listmeis...@suddenlink.net> 
> wrote:
> 
> On 03/30/2019, at 02:35, Bill Kochman <wordweaver...@gmail.com 
> <mailto:wordweaver...@gmail.com>> wrote:
>> Chris, you wrote:
>> 
>> #!/usr/bin/env bash
>> nl -nrz -w2 -s'. '
>> 
>> That works on all lines. What about if you have blank lines in the document? 
>> While it works fine on files that have continuous lines of text, the above 
>> indents two spaces and places a period on blank lines.
> 
> 
> Hey Bill,
> 
> The -w2 switch (i.e. -w switch with 2 as its value), designates the width of 
> the padded line number.
> 
> I think the addition of the period in blank lines is a bug in macOS' version 
> of `nl`, because GNU `nl` doesn't have that problem.  (The indention will 
> vary according to -w.)
> 
> 
> #!/usr/bin/env bash
> nl -nrz -ba -w3 -s'. '
> 
> This will number ALL lines including blank ones.
> 
> 
> man nl in the Terminal will get you to the man page for `nl`, so you can see 
> what the various switches do.
> 
> 
> To work around your complaint you can install GNU `nl` with MacPorts or 
> HomeBrew.
> 
> Or you can use a little `sed` to remove the floating period:
> 
> #!/usr/bin/env bash
> nl -nrz -w2 -s'. ' | sed -E 's!^[[:blank:]]+\.!!'
> 
> 
> --
> Take Care,
> Chris
> 
> 
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