Typos in Quotation.Rmd (hadley#1052)

I assign the copyright of this contribution to Hadley Wickham

Quotation.Rmd

@@ -714,7 +714,7 @@ One application is to create functions that work like `graphics::curve()`. `curv
 curve(sin(exp(4 * x)), n = 1000)
 ```
 
-Here `x` is a pronoun. As with `.` in pipelines and `.x` and `.y` in purrr functioanls, `x` doesn't represent a single concrete value, but is instead a placeholder that varies over the range of the plot. Functions, like `curve()`, that use a expression containing a pronoun are known as __anaphoric__ functions[^anaphora].
+Here `x` is a pronoun. As with `.` in pipelines and `.x` and `.y` in purrr functionals, `x` doesn't represent a single concrete value, but is instead a placeholder that varies over the range of the plot. Functions, like `curve()`, that use an expression containing a pronoun are known as __anaphoric__ functions[^anaphora].
 
 [^anaphora]: Anaphoric comes from the linguistics term "anaphora", an expression that is context dependent. Anaphoric functions are found in [Arc](http://www.arcfn.com/doc/anaphoric.html) (a LISP like language), [Perl](http://www.perlmonks.org/index.pl?node_id=666047), and [Clojure](http://amalloy.hubpages.com/hub/Unhygenic-anaphoric-Clojure-macros-for-fun-and-profit).