The `..` syntax in 3.7 Exercises to refer to computed variable `prop` should be updated to use the best practice of `after_stat` instead. Reduces confusion and more aligns with the documentation.
* Fix a few minor typos
Examples include saying we'll learn about filter() in the next chapter, but it's not until chapter 5. And, also, it says we'll learn about how to use multiple geoms in the same plot in the next section, but then not far below, in the same section, it shows how to use multiple geoms.
* Three minor fixes in chapter 5
* Remove " I introduced in prior commit
To remain consistent with this sentence: "Since we already use the word "value" to describe data, let's use the word "level" to describe aesthetic properties."
* Keep the same "table of cut values" example
No need to go with imaginary values when there is a nice example that is used before and after this example.
* indent and remove extra comma
The following sentence is missing the bracketed word (i.e., "the"): "ggplot2 provides over 20 stats for you to use. Each stat is a function, so you can get help in [the] usual way"
The example wants to show different ways of producing the same plot (as done in the print version). One of the exercises refers to a `show.legend = FALSE` used previously. This change brings the parts back into harmony.
I think the concept is easier to understand by staying consistent with the `mpg` dataset, there's probably no need to introduce a new dataset for that remark only.
* minor typos in last exercise in common problems
* unusually easiest -> unusually easy
* move mapping(aes()) into geom to match other ggplot calls
* wording suggestion in exercise + typo fix
* feel be free -> feel free
* and new dataset -> and a new dataset, missing a
* dplyr overwrite's'
