Update tidy.Rmd (#221)

in Figure 9.2, you mention "table4" but the code uses "table4a and table4b". I can't run the code for table4a and table4b, the datasets from DSR refers to table4 for table4a and table5 for table4b.
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S'busiso Mkhondwane 2016-08-02 16:13:39 +02:00 committed by Hadley Wickham
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@ -133,7 +133,7 @@ To tidy a dataset like this, we need to __gather__ those column into a new pair
the `key`, and here it is `year`.
* The name of the variable whose values are spread over the cells. I call
that `value`. and here it's the number of `cases`.
that `value`, and here it's the number of `cases`.
Together those parameters generate the call to `gather()`: