[tz] [PROPOSED PATCH 2/2] Use "№" for number sign in commentary

[Paul Eggert]

Gwillim Law wrote:
> I don't see any solecism. The superscript o is not an ordinal indicator
> here. Nº is not a synonym for Nth. The words that are abbreviated Nº are
> masculine nouns: French numéro, Spanish número, Italian numero, etc.

Perhaps I'm being pedantic, but I think º (U+00BA MASCULINE ORDINAL INDICATOR) 
should be used only with ordinals.  I know ordinal indicators are sometimes used 
elsewhere (e.g., "M.ª" for "Maria" in Portuguese, "Nº" for "Number" in English) 
but these should really be superscript letters and using ordinal indicators can 
lead to inconsistencies.  For example, the Portuguese abbreviation for 
"Excelentíssimo" is "Ex." followed by superscript "mo" and no ordinal indicator 
looks like superscript "m" so people typically either use superscript "mo" or 
don't bother with superscripting and just write "Ex.mo", and this is 
inconsistent with using an ordinal indicator to abbreviate "Maria".