fix period0 leap year in mock

Author: archmoj

test/image/baselines/period_positioning5.png

@@ -41,8 +41,8 @@
             "name": "start (Y1)",
             "type": "scatter",
             "y": [1, 2, 3, 4, 5, 6],
-            "x": ["2001-01", "2002-01", "2003-01", "2004-01-02", "2005-01", "2006-01"],
-            "xperiod0": "2001-01-01",
+            "x": ["2001-01", "2002-01", "2003-01", "2004-01", "2005-01", "2006-01"],
+            "xperiod0": "2002-01-01",
             "xperiodalignment": "start"
         },
         {
@@ -52,8 +52,8 @@
             "name": "middle (Y1)",
             "type": "bar",
             "y": [1, 2, 3, 4, 5, 6],
-            "x": ["2001-01", "2002-01", "2003-01", "2004-01-02", "2005-01", "2006-01"],
-            "xperiod0": "2001-01-01",
+            "x": ["2001-01", "2002-01", "2003-01", "2004-01", "2005-01", "2006-01"],
+            "xperiod0": "2002-01-01",
             "xperiodalignment": "middle"
         },
         {
@@ -63,8 +63,8 @@
             "name": "end (Y1)",
             "type": "scatter",
             "y": [1, 2, 3, 4, 5, 6],
-            "x": ["2001-01", "2002-01", "2003-01", "2004-01-02", "2005-01", "2006-01"],
-            "xperiod0": "2001-01-01",
+            "x": ["2001-01", "2002-01", "2003-01", "2004-01", "2005-01", "2006-01"],
+            "xperiod0": "2002-01-01",
             "xperiodalignment": "end"
         },