title: Change whisker definition for only one level of a factor in `geom_boxplot`
body: <p>I'm trying to change the whisker definition to extend to the minimum and maximum (<em>i.e.</em>, not to consider anything as an outlier), as in <a href="https://stackoverflow.com/a/4765608/1085344">this question</a>, but only for a <em>single</em> level of the factor that is mapped to the x-axis. The code in that answer will change the whisker definition for the entire plot.</p>
  
  <p>What's the proper way, if any, to go about this?</p>