cli 3.3.0

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

• ansi_*() functions support ANSI hyperlinks again (#444).

• Turning off ANSI colors via the cli.num_colors option or the
  R_CLI_NUM_COLORS or the NO_COLOR environment variable now also turns off
  ANSI hyperlinks (#447).

• symbol now only has two variants: UTF-8 and ASCII. There are no special
  variants for RStudio and Windows RGui any more (#424).

v3.2.0

Breaking change

• The cli_theme_dark option is know known as cli.theme_dark, to be
  consistent with all other cli option names (#380).

Other changes

• The preferred names of the S3 clases ansi_string, ansi_style, boxx,
  rule and tree now have cli_ prefix: cli_ansi_string, etc. This will
  help avoiding name conflicts with other packages eventually, but for now
  the old names are kept as well, for compatibility.

• cli_abort() has been updated to work nicely with rlang 1.0. The
  default call and backtrace soft-truncation are set to .envir
  (which itself is set to the immediate caller of cli_abort() by
  default).

  Line formatting now happens lazily at display time via
  rlang::cnd_message() (which is called by the conditionMessage()
  method for rlang errors).

• New hash_sha256() function to calculate SHA-256 hashes. New
  hash_raw_*(), hash_obj_*() and hash_file_*() functions to calculate
  various hashes of raw vectors, R objects and files.

• You can use the new cli.default_num_colors option to set the default
  number of ANSI colors, only if ANSI support is otherwise detected.
  See the details in the manual of num_ansi_colors().

• You can set the new ESS_BACKGROUND_MODE environment variable to
  dark to indicate dark mode.

• cli now handles quotes and comment characters better in the semantion
  cli_*() functions that perform glue string interpolation (#370).

v3.1.1

• style_hyperlink() gains a params= argument (#384).

v3.1.0

Breaking changes

• The C progress bar API now uses double instead of int as the data
  type of the progress units (#335).

New features

• Several improvements and changes in the ansi_*() functions:

  • most ansi_*() functions are now implemented in C and they are
    much faster (#316).
  • they handle NA values better.
  • many functions now use UTF-8 graphemes by default instead of code
    points. E.g. ansi_nchar() counts graphemes, etc.
  • they convert their input to UTF-8 and always return UTF-8
    encoded strings.
  • new function ansi_simplify() to remove superfluous ANSI tags.
  • new function ansi_html() to convert ANSI-highlighted strings
    to HTML.
  • ansi_has_any() and ansi_strip() now have sgr and csi
    arguments to look for SGR tags, CSI tags, or both.

• New functions that handle UTF-8 encoded strings correctly:
  utf8_graphemes(), utf8_nchar(), utf8_substr().

• Support for palettes, including a colorblind friendly palette.
  See ?ansi_palettes for details.

• True color support: num_ansi_colors() now detects terminals with
  24 bit color support, and make_ansi_style() uses the exact RGB colors
  on these terminals (#208).

• The new col_br_*() and bg_br_() functions create bright versions of
  eight base ANSI colors (#327).

• New function code_highlight() to syntax highlight R code. It supports
  several themes out of the box, see code_theme_list() (#348).

• New functions for hashing: hash_animal(), hash_emoji() and
  hash_md5().

• New diff_chr() and diff_str() functions to calculate the difference
  of character vectors and letters of strings.

Smaller improvements

• Progress bars with clear = FALSE now print the last, completed, state
  properly.

• The progress bar for Shiny apps now handles output from
  cli_progress_output().

• Progress variables in C format_done strings work correctly now (#337).

• cli_dl() now works with an empty description, and gives a better
  error for invalid input (#347).

• rule() is now works better if the labels have ANSI markup.

• cli_spark objects now have format() and print() methods.

• cli_process_done() now does not error without a process (#351).

• ANSI markup is now supported in RStudio jobs (#353).

• The lack of ANSI support is now again correctly detected if there is an
  active sink() (#366).

cli 3.0.1

• ansi_strtrim() now correctly keeps NA values (#309).

• format_inline() now uses the correct environment (@rundel, #314).

v3.0.1

• ansi_strtrim() now correctly keeps NA values (#309).

• format_inline() now uses the correct environment (@rundel, #314).

v3.0.0

• New functions for progress bars, please see the new articles at
  https://cli.r-lib.org/articles/ for details.

• New cli_abort(), cli_warn() and cli_inform() functions, to throw
  errors with cli pluralization and styling.

• New format_inline() function to format a cli string without emitting
  it (#278).

v2.5.0

• New style_no_*() functions to locally undo styling.
  New col_none() and bg_none() functions to locally undo text color
  and background color.

• It is now possible to undo text and background color in a theme, by
  setting them to NULL or "none".

• cli_memo() was renamed to cli_bullets(), as it is by default
  formatted as a bullet list (#250).

• New ansi_toupper(), ansi_tolower and ansi_chartr() functions,
  the ANSI styling aware variants of toupper(), tolower() and
  chartr() (#248).

• New test_that_cli() helper function to write testthat tests for
  cli output.

• tree() now does not produce warnings for tibbles (#238).

• New inline style: .cls to format class names, e.g.
  "{.var fit} must be an {.cls lm} object".

v2.4.0

• New cli_memo() function to create a list of items or tasks.

• New cli::cli() function to create a single cli message from multiple
  cli calls (#170).

• cli now highlights weird names, e.g. path names with leading or
  trailing space (#227).

• Styling is fixed at several places. In particular, nested lists should
  be now formatted better (#221).

• New spark_bar() and spark_line() funcions to draw small bar or
  line charts.

v.2.3.1

• ANSI color support detection works correctly now in older RStudio,
  and also on older R versions.

• cli_h1(), cli_h2() and cli_h3() now work with multiple glue
  substitutions (#218).

v2.3.0

• boxx() now correctly calculates the width of the box for non-ASCII
  characters.

• New ansi_trimws() and ansi_strwrap() functions, they are similar
  to trimws() and strwrap() but work on ANSI strings.

• New ansi_columns() function to format ANSI strings in multiple columns.

• ansi_substr(), ansi_substring(), ansi_strsplit(), ansi_align()
  now always return ansi_string objects.

• ansi_nchar(), ansi_align(), ansi_strtrim() and the new
  ansi_strwrap() as well handle wide Unicode correctly, according to
  their display width.

• boxx() can now add headers and footers to boxes.