Add separate doc/syntax/pattern_matching.rdoc, add
link to control_expressions.rdoc.
The documentation is "reverse-engineered" from Ruby 2.7
behavior and early preview presentations, and corrected
by pattern-matching feature author @k-tsj.
the specification from the wiki.
* doc/syntax.rdoc: Added link to refinements document.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38913 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* doc/syntax/modules_and_classes.rdoc: Fixed link
* doc/syntax.rdoc: Updated with links to the recently added pages
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38842 b2dd03c8-39d4-4d8f-98ff-823fe69b080e