line breaks after opening paren only with strict styling

[lorenzwalthert]

Since quite invasive, do not break lines in multi-line function calls if strict = FALSE as a first step.
Then, when tidyverse/style#39 is sorted out, implement a solution where the line break depends on whether or not an argument is named as a second step.

Reference: tidyverse/tibble@6f25289#commitcomment-24340010

[lorenzwalthert]

Reference #246.