added support for multi-level hierarchy in assert_table_entry fieldNames. Also fixed name of the xAvgCharWidth field
added support for multi-level hierarchy in assert_table_entry fieldNames. Also fixed name of the xAvgCharWidth field

googlefonts/fontbakery,googlefonts/fontbakery,moyogo/fontbakery,googlefonts/fontbakery,graphicore/fontbakery,graphicore/fontbakery,moyogo/fontbakery,moyogo/fontbakery,graphicore/fontbakery