test: backfill tests for %q/%Q spanning a heredoc

Also rename the fixture file

Author: flavorjones

test/yarp/fixtures/spanning_heredoc.txt

@@ -0,0 +1,25 @@
+# test regex, string, and lists that span a heredoc thanks to an escaped newline
+
+# ripper incorrectly creates a "b\nb" token instead of two separate string tokens
+pp <<-A.gsub(/b\
+a
+A
+b/, "")
+
+# ripper incorrectly creates a "d\nd" token instead of two separate string tokens
+pp <<-A, "d\
+c
+A
+d"
+
+# ripper gets this right
+pp <<-A, %q[f\
+e
+A
+f]
+
+# ripper incorrectly creates a "h\nh" token instead of two separate string tokens
+pp <<-A, %Q[h\
+g
+A
+h]

test/yarp/fixtures/wrapping_heredoc.txt

@@ -77,7 +77,7 @@ def test_parse_lex_file
     # into a single token. See https://bugs.ruby-lang.org/issues/19838.
     #
     # Additionally, Ripper cannot parse the %w[] fixture in this file, so set ripper_should_parse to false.
-    ripper_should_match = false if relative == "wrapping_heredoc.txt"
+    ripper_should_match = false if relative == "spanning_heredoc.txt"
 
     define_method "test_filepath_#{relative}" do
       # First, read the source from the filepath. Use binmode to avoid converting CRLF on Windows,