cli 3.4.0

• New experimental styles to create ANSI hyperlinks in RStudio and
  terminals that support them. See ?cli::links for details (#513).

• Expressions that start and end with a {} substitution are now styled
  correctly. E.g. {.code {var1} + {var2}} (#517).

• New {.obj_type_friendly} inline style to format the type of an R object
  in a user friendly way (#463).

• Improved vector collapsing behavior. cli now shows both the beginning
  and end of the collapsed vector, by default (#419).

• Nested cli() calls work now (#497).

• Return values now work as they should within cli() calls (#496).

• Style attributes with underscores have new names with dashes instead:
  vec_sep, vec_last, vec_trunc, string-quote. The old names still
  work, but the new ones take precedence (#483).

• cli now does not crash at the end of the R session on Arm Windows
  (#494; @kevinushey)

• Vectors are truncated at 20 elements now by default, instead of 100 (#430).

• 20 new spinners from the awesome
  cli-spinners package,
  and from @HenrikBengtsson in #469.
  Run this to demo them, some need UTF-8 and emoji support:

  new <- c("dots13", "dots8Bit", "sand", "material", "weather", "christmas",
    "grenade", "point", "layer", "betaWave", "fingerDance", "fistBump",
    "soccerHeader", "mindblown", "speaker", "orangePulse", "bluePulse",
    "orangeBluePulse", "timeTravel", "aesthetic", "growVeriticalDotsLR",
    "growVeriticalDotsRL", "growVeriticalDotsLL", "growVeriticalDotsRR")
  demo_spinners(new)

• cli exit handlers are now compatible again with the withr package (#437).

• cli functions now keep trailing \f characters as newlines.
  They also keep multiple consecutive \f as multiple newlinees (#491).

• {} substitutions within inline styles are now formatted correctly.
  E.g. {.code download({url})} will not add backticks to url, and
  {.val pre-{x}-post} will format the whole value instead of x.
  (#422, #474).

• cli now replaces newline characters within {.class ... } inline styles
  with spaces. If the cli.warn_inline_newlines option is set to TRUE, then
  it also throws a warning. (#417).

• code_highlight now falls back to the default theme (instead of no theme)
  for unknown RStudio themes (#482, @rossellhayes).

• cli_abort() now supplies .frame to abort(). This fixes an
  issue with the .internal = TRUE argument (r-lib/rlang#1386).

• cli now does a better job at detecting the RStudio build pane, job pane
  and render pane, and their capabilities w.r.t. ANSI colors and hyperlinks.
  Note that this requires a daily build of RStudio (#465).

• New functions for ANSI strings: ansi_grep(), ansi_grepl(),
  ansi_nzchar(). They work like the corresponding base R functions, but
  handle ANSI markup.

• style_hyperlink() (really) no longer breaks if the env variable VTE_VERSION
  is of the form \d{4}, i.e., 4 consecutive numbers (#441, @MichaelChirico)

• cli_dl() and its corresponding cli_li() can now style the labels.

• The behavior cli's inline styling expressions is now more predictable.
  cli does not try to evaluate a styled string as an R expression any more.
  E.g. the meaning of "{.emph +1}" is now always the "+1", with style
  .emph, even if an .emph variable is available and the .emph + 1
  expression can be evaluated.

• Functions that apply bright background colors (e.g. bg_br_yellow()) now
  close themselves. They no longer format text after the end of the function
  (#484, @rossellhayes).