Bug Report, to_ical() has unexpected \r\n

[alswl]

Version: icalendar==4.0.6
Python: Python 3.7.7

Debug:

ipdb> ical_filtered
VCALENDAR({'VERSION': vText('b'2.0''), 'PRODID': vText('b'-//Toodledo iCal//www.toodledo.com//EN''), 'CALSCALE': vText('b'GREGORIAN''), 'METHOD': vText('b'PUBLISH''), 'X-WR-CALNA
ME': vText('b'Toodledo iCal''), 'LAST-MODIFIED': <icalendar.prop.vDDDTypes object at 0x108025390>}, VEVENT({'URL': 'http://www.toodledo.com/tasks/index.php?x=1101923#task_2742791
41', 'CREATED': <icalendar.prop.vDDDTypes object at 0x108096890>, 'DTSTAMP': <icalendar.prop.vDDDTypes object at 0x108091f50>, 'LAST-MODIFIED': <icalendar.prop.vDDDTypes object a
t 0x108096690>, 'SEQUENCE': 1592197755, 'UID': vText('b'467f687c55004933dc62b03f8f4defd9#toodledo.com''), 'SUMMARY': vText('b'team stand-up meeting''), 'DESCRIPTION': vText('b'Ti
me estimate: 15 mins\\nFolder: Routine\\nContext: Work\\nStatus: Waiting''), 'PRIORITY': 5, 'STATUS': vText('b'CONFIRMED''), 'TRANSP': vText('b'OPAQUE''), 'DTSTART': <icalendar.p
rop.vDDDTypes object at 0x108096c10>, 'DTEND': <icalendar.prop.vDDDTypes object at 0x108096bd0>, 'CATEGORIES': <icalendar.prop.vCategory object at 0x108096c50>, 'RESOURCES': vTex
t('b'Work''), 'RRULE': vRecur({'FREQ': ['WEEKLY'], 'BYDAY': ['MO', 'TU', 'WE', 'TH', 'FR']})}))
ipdb> ical_filtered.to_ical()
b'BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//Toodledo iCal//www.toodledo.com//EN\r\nCALSCALE:GREGORIAN\r\nMETHOD:PUBLISH\r\nLAST-MODIFIED:20200616T003840Z\r\nX-WR-CALNAME:Toodle
do iCal\r\nBEGIN:VEVENT\r\nSUMMARY:team stand-up meeting\r\nDTSTART:20200616T094500\r\nDTEND:20200616T100000\r\nDTSTAMP:20200103T120000Z\r\nUID:467f687c55004933dc62b03f8f4defd9#t
oodledo.com\r\nSEQUENCE:1592197755\r\nRRULE:FREQ=WEEKLY;BYDAY=MO,TU,WE,TH,FR\r\nCATEGORIES:Routine\r\nCREATED:20200103T120000Z\r\nDESCRIPTION:Time estimate: 15 mins\\nFolder: Rou
tine\\nContext: Work\\nStatus\r\n : Waiting\r\nLAST-MODIFIED:20200615T050915Z\r\nPRIORITY:5\r\nRESOURCES:Work\r\nSTATUS:CONFIRMED\r\nTRANSP:OPAQUE\r\nURL:http://www.toodledo.com/
tasks/index.php?x=1101923#task_274279141\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n'

Notice the vText('b'Ti me estimate: 15 mins\\nFolder: Routine\\nContext: Work\\nStatus: Waiting'') was convert to DESCRIPTION:Time estimate: 15 mins\\nFolder: Rou tine\\nContext: Work\\nStatus\r\n : Waiting\r\n.

Expected: DESCRIPTION:Time estimate: 15 mins\\nFolder: Rou tine\\nContext: Work\\nStatus: Waiting\r\n.