[bug #65710] [preconv] require disambiguation of U+00A0 on input

[G. Branden Robinson]

URL:
  <https://savannah.gnu.org/bugs/?65710>

                 Summary: [preconv] require disambiguation of U+00A0 on input
                   Group: GNU roff
               Submitter: gbranden
               Submitted: Tue 07 May 2024 11:50:39 AM UTC
                Category: Utilities
                Severity: 3 - Normal
              Item Group: Feature change
                  Status: Need Info
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None


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Follow-up Comments:


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Date: Tue 07 May 2024 11:50:39 AM UTC By: G. Branden Robinson <gbranden>
Considering bug #65693, I suggest that it may be worth treating an input
U+00A0 as ambiguous: is it a fixed-width non-breakable space, or a
variable-width non-breakable space?  Unicode does not distinguish.

This is analogous to how we don't know whether a man page author means a
hyphen or a minus sign when they type `-`.

In my opinion preconv should either:

1.  Fail and force the user to edit the input to make a real choice,
eliminating U+00A0 in the input.

2.  Add an option instructing preconv which escape sequence to transform
U+00A0 into.








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