Reverting comment removal for MultiLineStringField

Author: benlachman

marshmallow_mongoengine/conversion/fields.py

@@ -219,4 +219,5 @@ class Builder(MetaFieldBuilder):
 # me.fields.GeoPointField: ma_fields.GeoPoint,
 # me.fields.PolygonField: ma_fields.Polygon,
 # me.fields.MultiPointField: ma_fields.MultiPoint,
+# me.fields.MultiLineStringField: ma_fields.MultiLineString,
 # me.fields.MultiPolygonField: ma_fields.MultiPolygon,