[Rpm-maint] [rpm-software-management/rpm] RFE: Do-what-I-mean semantics for macros in spec comments (#158)

[Panu Matilainen]

Of course, @ffesti is right - the *actual* problem is that there's no way to copmletely discard lines. What we need, instead of complex heuristics and different modes and all, is the equivalent of M4 "dnl".
Quoting from https://www.gnu.org/savannah-checkouts/gnu/m4/manual/m4-1.4.18/html_node/Dnl.html, this fits the bill just about perfectly:

> All characters, up to and including the next newline, are discarded without performing any macro expansion. 
> The expansion of dnl is void. 

I was about to suggest %rem for this but perhaps %dnl, with intentional association with M4, would be a better choice because it's semantics are exactly what is called for here.

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