[ruby/yarp] Fix backslash-r (CR) delimited strings

now CR can be used as a string delimiter

ruby/prism@3d27bad797

test/yarp/snapshots/newline_terminated.txt

@@ -1,13 +1,26 @@
-ProgramNode(76...106)(
+ProgramNode(76...212)(
   [],
-  StatementsNode(76...106)(
-    [StringNode(76...82)((76...78), (78...81), (81...82), "foo"),
-     StringNode(83...90)((83...86), (86...89), (89...90), "foo"),
-     StringNode(91...98)((91...94), (94...97), (97...98), "foo"),
-     RegularExpressionNode(99...106)(
-       (99...102),
-       (102...105),
-       (105...106),
+  StatementsNode(76...212)(
+    [StringNode(76...82)((76...78), (78...81), (81...82), "abc"),
+     StringNode(84...90)((84...86), (86...89), (89...90), "abc"),
+     StringNode(92...98)((92...94), (94...97), (97...98), "abc"),
+     StringNode(100...106)((100...102), (102...105), (105...106), "abc"),
+     StringNode(108...114)((108...110), (110...113), (113...114), "abc"),
+     StringNode(116...122)((116...118), (118...121), (121...122), "abc"),
+     StringNode(124...130)((124...126), (126...129), (129...130), "abc"),
+     StringNode(132...139)((132...134), (134...138), (138...139), "\rabc"),
+     StringNode(142...149)((142...144), (144...148), (148...149), "\rabc"),
+     StringNode(151...157)((151...153), (153...156), (156...157), "abc"),
+     StringNode(159...165)((159...161), (161...164), (164...165), "abc"),
+     StringNode(167...173)((167...169), (169...172), (172...173), "abc"),
+     StringNode(175...181)((175...177), (177...180), (180...181), "abc"),
+     StringNode(182...188)((182...184), (184...187), (187...188), "foo"),
+     StringNode(189...196)((189...192), (192...195), (195...196), "foo"),
+     StringNode(197...204)((197...200), (200...203), (203...204), "foo"),
+     RegularExpressionNode(205...212)(
+       (205...208),
+       (208...211),
+       (211...212),
        "foo",
        0
      )]