[Groff] [Heirloom] Adding \I for groff's \A functionallity

[carsten . kunze]

Hello,

in lack of a Heirloom roff mailing list from time to time I use the groff list 
for Heirloom discussions hoping that some Heirloom users are on this list.

It had IMHO been an unfortunate decision to to give \A at Heirloom a different 
meaning than that of groff's \A.  Now I need this function for mdoc(7).  
groff's \A is available in compatibility mode but this is not used in mdoc(7).  
Searching for a new escape I'd like to use \I which would then be available 
when xflag is not 0.  Normally this should not cause backward compatibility 
issues.

Are there reasons against assigning that function to \I?

--Carsten