inconsistences -> inconsistencies (hadley#527)

vectors.Rmd

@@ -8,7 +8,7 @@ Vectors are particularly important as most of the functions you will write will
 
 ### Prerequisites
 
-The focus of this chapter is on base R data structures, so it isn't essential to load any packages. We will, however, use a handful of functions from the __purrr__ package to avoid some inconsistences in base R.
+The focus of this chapter is on base R data structures, so it isn't essential to load any packages. We will, however, use a handful of functions from the __purrr__ package to avoid some inconsistencies in base R.
 
 ```{r setup, message = FALSE}
 library(tidyverse)