lb5.353: trim$() does not cuts CR, LF

[tsh73]

a$="a"
print"<";a$;">"

a$=" "+a$
print"<";a$;">"
print"trim <";trim$(a$);">"

a$=chr$(10)+a$
print"<";a$;">"
print"trim <";trim$(a$);">"

a$=chr$(13)+a$
print"<";a$;">"
print"trim <";trim$(a$);">"
Expected behaviour: all lines with TRIM shout output
trim <a>
What actually happens:
<a>
< a>
trim <a>
<
a>
trim <
a>
<

a>
trim <

a>

[Marco Kurvers]

I think it makes sense too. The function removes only the spaces, but not the additional control codes.