bug#33743: 26.1; ada-mode 6.0.0 indentation of comments before "then"

[Ludovic Brenta <ludovic@ludovic-brenta.org>]

Package: emacs, ada-mode
X-Debbugs-CC: ada-mode-users@nongnu.org

Hello,

With ada-mode 6.0.0, comments appearing on a line of their on before 
"then"
are indented like "then"; we think they should be indented one more 
level:

procedure Comment_Indentation is
begin
   if A
     -- This comment is indented correctly
     and then B
   -- This comment is indented incorrectly, should be as above
   then
     -- This comment is indented correctly
     null;
   elsif C
     -- This comment is indented correctly
     and then D
   -- This comment is indented incorrectly, should be as above
   then
     null;
   end if;
end Comment_Indentation;

This "incorrect" indentation is a change from ada-mode 5.2.1 which can
affect many lines in our large code base.  In 5.2.1, all comments are
indented in the same way.

I have browsed the ada-mode customization variables but did not see
which one, if any, allows us to customize this behavior.  (note: we
set ada-indent to 2).

--
Ludovic Brenta.