> . If-else clauses look like this:
>
> .ie ... \{\
> ...
> .\}
> .el \{\
> .\}
>
> Note the trailing backslashes! I think this was the reason of
> not getting more than a single footnote.
No, the reason for not getting more than one footnote was an
interesting syntactic "feature": the expression for the value
of a number register in a ".nr" request must be given as a
single argument (without spaces) unless you use parentheses
to indicate that the expression isn't finished yet with the
first space character:
.nr footnote_flag \\n[footnote_flag] +1 \" doesn't work
.nr footnote_flag \\n[footnote_flag]+1 \" works
.nr footnote_flag (\\n[footnote_flag] +1) \" works
This is because it is also possible to give a 3rd argument
to ".nr", to be used as an auto-increment value whenever
that number register is accessed.
Of course, like Werner already said, in the case of
incrementing or decrementing a number register, you
can use the simpler syntax:
.nr footnote_flag +1 \" works
Regarding if and if-else clauses with multi-line grouping:
.ie ... \{
...
.\}
.el \{
...
.\}
without the backslashes is syntactically correct, but gives
you extra blank lines (from the "\{" lines). This can be
avoided with (note the dot):
.ie ... \{.\" comment
...
.\}
.el \{.\" another comment
...
.\}
(there was a discussion regarding this a while back on this
list).
Regarding footnotes: Clarke, you might also want to
take a look at the "Tutorial Examples" at the end of
the "Troff User's Manual".
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