Support squiggly heredocs in ruby-mode

* lisp/progmodes/ruby-mode.el (ruby-here-doc-beg-re):
Support squiggly heredocs added in Ruby 2.3.

* test/indent/ruby.rb: Add squiggly example.

1 files changed, 4 insertions, 0 deletions

diff --git a/test/indent/ruby.rb b/test/indent/ruby.rb
index dec6de98605..dfd1c75a679 100644
--- a/test/indent/ruby.rb
+++ b/test/indent/ruby.rb
@@ -4,6 +4,10 @@ if something_wrong?             # ruby-move-to-block-skips-heredoc
   end
   eowarn
   foo
+
+  foo(<<~squiggly)
+  end
+  squiggly
 end
 
 def foo