testthat 3.1.1

• Condition expectations like expect_error() now match across the
  ancestry of chained errors (#1493). You can disable this by setting
  the new inherit argument to FALSE.

• Added preliminary support for rlang 1.0 errors. It is disabled by
  default for the time being. To activate it, specify
  rlang (>= 1.0.0) in your DESCRIPTION file (or >= 0.99.0.9001 if you're
  using the dev version).

  Once activated, snapshots will now use rlang to print error and
  warning messages, including the Error: and Warning:
  prefixes. This means the call field of conditions is now displayed
  in snapshots if present. Parent error messages are also displayed.
  Following this change, all snapshots including error and warning
  messages need to be revalidated.

  We will enable the new rlang 1.0 output unconditionally in a future
  release.

• expect_snapshot() gains a new argument cnd_class to control
  whether to show the class of errors, warnings, and messages.

  The default is currently unchanged so that condition classes keep
  being included in snapshots. However, we plan to change the default
  to FALSE in an upcoming release to prevent distracting snapshot
  diffing as upstream packages add error classes. For instance, the
  development version of R is currently adding classes to basic
  errors, which causes spurious snapshot changes when testing against
  R-devel on CI.

  If you depend on rlang 1.0 (see above), the default is already set
  to FALSE.

• expect_snapshot() no longer processes rlang injection operators
  like !!.

• Fixed bug in expectations with long inputs that use :: (#1472).