Fix a bug catched by the rule

Author: seisman

pygmt/tests/test_info.py

@@ -99,7 +99,7 @@ def test_info_dataframe(dtype):
     """
     Make sure info works on pandas.DataFrame inputs.
     """
-    table = pd.read_csv(POINTS_DATA, sep=" ", header=None)
+    table = pd.read_csv(POINTS_DATA, sep=" ", header=None, dtype=dtype)
     output = info(data=table)
     expected_output = (
         "<vector memory>: N = 20 <11.5309/61.7074> <-2.9289/7.8648> <0.1412/0.9338>\n"