Allow Python string escape sequences in value literals.

libpathod/rparse.py

@@ -165,7 +165,7 @@ class FileGenerator:
 
 class _Value:
     def __init__(self, val):
-        self.val = val
+        self.val = val.decode("string_escape")
 
     def get_generator(self, settings):
         return LiteralGenerator(self.val)

test/test_rparse.py

@@ -40,7 +40,11 @@ class TestMisc:
     def test_valueliteral(self):
         v = rparse.ValueLiteral("foo")
         assert v.expr()
-        assert str(v)
+        assert v.val == "foo"
+
+        v = rparse.ValueLiteral(r"foo\n")
+        assert v.expr()
+        assert v.val == "foo\n"
 
     def test_valuenakedliteral(self):
         v = rparse.ValueNakedLiteral("foo")