Use base pipe in examples

[georgestagg]

e.g.

rvest/R/text.R

Lines 36 to 40 in c9be5b8

	#' # By default, html_text2() also converts non-breaking spaces to regular
	#' # spaces:
	#' html <- minimal_html("<p>x&nbsp;y</p>")
	#' x1 <- html %>% html_element("p") %>% html_text()
	#' x2 <- html %>% html_element("p") %>% html_text2()