Fix alignments.

Author: kdeldycke

tabulate/__init__.py

@@ -480,8 +480,8 @@ def escape_empty(val):
         ),
         linebetweenrows=None,
         linebelow=None,
-        headerrow=DataRow("|", "|", "|"),
-        datarow=DataRow("|", "|", "|"),
+        headerrow=DataRow("| ", " | ", " |"),
+        datarow=DataRow("| ", " | ", " |"),
         padding=1,
         with_header_hide=["lineabove"],
     ),