swirldev/swirl — pull request #95 by WilCrofter (2014-03-01 02:14:17+00:00)
Title: Autodetect

Turn automatic detection of new variables off for the duration of a lesson from customTests.R using:

`AUTO_DETECT_NEWVAR <- FALSE`

This would prevent commands entered by users from automatically being executed twice. There are several circumstances in which repeated execution is inappropriate. For instance, when the user is asked to print or plot, repeated execution would cause two prints or two plots to appear.