Ruby adds support for forwarding arguments to a method, along with the leading arguments... operator was limited to forwarding arguments. With Ruby 3.0, it can forward the arguments along with the leading arguments.
Ruby adds `Symbol#name` to return frozen string corresponding to the symbol nameRuby has added `Symbol#name`, which returns the name of the symbol if it is named. The returned string can not be modified.
Ruby adds experimental support for Rightward assignmentsPreviously ruby used to support only Rvalue to be assigned to Lvalue. Now, it adds support for Rightward assignment
Ruby introduces find pattern in pattern matchingFind pattern is introduced in pattern matching, which is useful in matching arrays.
Ruby 3.0 - Procs accepting a single rest argument and keyword arguments are no longer subject to autosplattingRuby 3.0 changed the inconsistent behavior for autosplatting, when rest argument and keyword arguments are present for a Proc
Ruby adds experimental support for end-less method definitionRuby has added a new experimental syntax for defining single-line methods without using the end keyword.
Heredocs and how to use them in Ruby and RailsWhat are heredoc and different ways to use them in Ruby and Rails.
Rails adds round_mode parameter support to number helpersRails has added :round_mode parameter support to number helpers
Ruby 2.7 - Setting $ special variables to non-nil value is now warnedIn Ruby 2.7, setting special variable $, $; $/ $\ to non-nil values will now show a deprecated warning
Ruby 2.7 removes taint checking mechanismRuby 2.7 access and setting of $SAFE is now always warned. $SAFE will become a normal global variable in Ruby 3.0