Add test

Author: yt2b

extra_tests/snippets/builtin_format.py

@@ -64,3 +64,5 @@ def test_zero_padding():
 assert f"{123.456:010,}" == "00,123.456"
 assert f"{123.456:011,}" == "000,123.456"
 assert f"{123.456:+011,}" == "+00,123.456"
+assert f"{1234:.3g}" == "1.23e+03"
+assert f"{1234567:.6G}" == "1.23457E+06"