Merge pull request #401 from rspec/fix-warning-detection-for-ruby-27

Ignore Ruby 2.7 multiline warnings from gems

Author: JonRowe

lib/rspec/support/spec/stderr_splitter.rb

@@ -6,6 +6,7 @@ class StdErrSplitter
       def initialize(original)
         @orig_stderr    = original
         @output_tracker = ::StringIO.new
+        @last_line = nil
       end
 
       respond_to_name = (::RUBY_VERSION.to_f < 1.9) ? :respond_to? : :respond_to_missing?
@@ -38,12 +39,19 @@ def to_io
       def write(line)
         return if line =~ %r{^\S+/gems/\S+:\d+: warning:} # http://rubular.com/r/kqeUIZOfPG
 
+        # Ruby 2.7.0 warnings from keyword argments span multiple lines, extend check above
+        # to look for the next line.
+        return if @last_line =~ %r{^\S+/gems/\S+:\d+: warning:} &&
+                  line =~ %r{warning: The called method .* is defined here}
+
         # Ruby 2.7.0 complains about hashes used in place of keyword arguments
         # Aruba 0.14.2 uses this internally triggering that here
         return if line =~ %r{lib/ruby/2\.7\.0/fileutils\.rb:622: warning:}
 
         @orig_stderr.write(line)
         @output_tracker.write(line)
+      ensure
+        @last_line = line
       end
 
       def has_output?