Merge pull request tidyverse#668 from csgillespie/patch-1

Update introduction.Rmd

vignettes/introduction.Rmd

@@ -141,7 +141,7 @@ select(flights, -(year:day))
 
 This function works similarly to the `select` argument to the `base::subset()`. It's its own function in dplyr, because the dplyr philosophy is to have small functions that each do one thing well.
 
-There are a number of helper functions you can use within `select()`, like `starts_with()`, `ends_with()`, `matches()` and `contains()`. Theese let you quickly match larger blocks of variable that meet some criterion. See `?select` for more details.
+There are a number of helper functions you can use within `select()`, like `starts_with()`, `ends_with()`, `matches()` and `contains()`. These let you quickly match larger blocks of variable that meet some criterion. See `?select` for more details.
 
 You can rename variables with `select()` by using named arguments: