Previously, a mere (arguments '(#:tests? #f)) would lead
guix style -S inputs --input-simplification=safe
to bail out. It now recognizes such trivial argument lists and
proceeds.
* guix/scripts/style.scm (trivial-package-arguments?): New procedure.
(simplify-package-inputs): Use it in the 'safe case instead of 'null?'.
* tests/style.scm ("input labels, 'safe' policy, trivial arguments"):
New test.
68fa28b3c3