Do not generate multi-parameter infix calls

[Duhemm]

Multi-parameter infix calls may be removed in the future, so it's better
not to generate this kind of code.

This is blocking us for removing autotupling and multi-parameter infix calls in Dotty (see scala/scala3#4311), because we use sbt-buildinfo to generate the config of the language server when testing (the language server is compiled with Dotty).

[eed3si9n]

Yes!

[SethTisue]

Scala 2 users are still on 0.7.0 or 0.8.0 will start hitting this when Scala 2.13.3 comes out, thanks to scala/scala#8951 :

[error] /Users/tisue/scala-fortify-plugin/target/scala-2.13/src_managed/main/sbt-buildinfo/BuildInfo.scala:14:58: multiarg infix syntax looks like a tuple and will be deprecated
[error]     "version: %s, currentDateMillis: %s, checkGrant: %s" format (
[error]                                                          ^

glad to see it's already fixed :-)