live.md
In rvest: Easily Harvest (Scrape) Web Pages

has print method

Code
  bullets
Output
  {xml_nodeset (2)}
  [1] <title>Simple Bulleted List</title>
  [2] <ul>\n<li>Item 1</li>\n  <li>Item 2</li>\n  <li>Item 3</li>\n  <li>Item 4 ...

gracefully errors on bad inputs

Code
  as_key_desc("xyz")
Condition
  Error in `as_key_desc()`:
  ! No key definition for "xyz".
Code
  as_key_desc("X", "Malt")
Condition
  Error:
  ! `modifiers` must be one of "Alt", "Control", "Meta", or "Shift", not "Malt".
  i Did you mean "Alt"?