* little different to -> a little differently from
* reorder to match order in following code/table
* capitalization
* capitalization + punctuation
* replace / with or since it's hard to see between tt formatted code
* missing pronoun
* they're been -> they've been
* lets need apostrophe
* Instead of display -> Instead of displaying
* missing comma
* add mapping in front of aes in a bunch of locations
* adding mapping before aes for sections before the last section where it explicitly says from here on out we'll omit them to make calls simpler
* 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'
Also changed spellings to British English for consistency.
FYI. Table number of light speed measurements currently reads (#tab:variation). The code appears to be correct.