[Tests] Ignore convert errors for v7 PDFs

- Not sure if they are important

tests/utils/context.py

@@ -521,7 +521,12 @@ class TestContext(object):
         # m = re.match(r'([\d\.e-]+) \(([\d\.e-]+)\)', res.decode())
         # assert m
         # logging.debug('MSE={} ({})'.format(m.group(1), m.group(2)))
-        ae = int(res.decode())
+        s = res.decode()
+        # Remove error messages generated by KiCad 7 plotted PDFs
+        s = re.sub(r'^\s+\*+.*', '', s, 0, re.M)
+        s = re.sub(r'^\s+Output may be incorrect.*', '', s, 0, re.M)
+        s = s.strip()
+        ae = int(s)
         logging.debug('AE=%d' % ae)
         if png_ref:
             os.remove(png_ref)