Fix regression in plot_effect()

description

In the previous version plot_effect() only showed two lines by default, not the four it did before that. This merge restores the original behaviour.

system details

• RStudio Version: 1.2.5033
• R Version: 3.5.2
• OS Version: Windows 10

checklist

• This merge includes bug fixes or changes in the functionality of the package (whether they are user-visible or not).
  • update documentation including examples (if necessary)
  • update and polish NEWS.md
  • update version in DESCRIPTION
  • update date in DESCRIPTION
• This merge introduces new features.
  • new features are documented
  • new features have tests
• no remaining TODO, FIXME, or debug prints anywhere in the source files
• devtools::document()
• devtools::check() without errors or warnings

added bug label

marked the checklist item This merge includes bug fixes or changes in the functionality of the package (whether they are user-visible or not). as completed

marked the checklist item update and polish NEWS.md as completed

marked the checklist item update version in DESCRIPTION as completed

marked the checklist item update date in DESCRIPTION as completed

marked the checklist item no remaining TODO, FIXME, or debug prints anywhere in the source files as completed

marked the checklist item devtools::document() as completed

marked the checklist item devtools::check() without errors or warnings as completed

enabled an automatic merge when the pipeline for 993da0e9 succeeds

merged

mentioned in commit 89e6891e

mentioned in commit 0b22e53a