Merge branch alfroch-plotting-api-fraction-contour with refs/heads/master into...

Merge branch alfroch-plotting-api-fraction-contour with refs/heads/master into refs/merge-requests/537/train
49 jobs for !537 with alfroch-plotting-api-fraction-contour into master in 11 minutes and 41 seconds (queued for 4 seconds)
merge train