yading@11: Testing av_get_token()
yading@11: |''| -> || + ||
yading@11: || -> || + ||
yading@11: |:| -> || + |:|
yading@11: |\| -> |\| + ||
yading@11: |'| -> || + ||
yading@11: |    ''    :| -> || + |:|
yading@11: |    ''  ''  :| -> |  | + |:|
yading@11: |foo   '' :| -> |foo   | + |:|
yading@11: |'foo'| -> |foo| + ||
yading@11: |foo     | -> |foo| + ||
yading@11: |  '  foo  '  | -> |  foo  | + ||
yading@11: |foo\| -> |foo\| + ||
yading@11: |foo':  blah:blah| -> |foo:  blah:blah| + ||
yading@11: |foo\:  blah:blah| -> |foo:  blah| + |:blah|
yading@11: |foo'| -> |foo| + ||
yading@11: |'foo :  '  :blahblah| -> |foo :  | + |:blahblah|
yading@11: |\ :blah| -> | | + |:blah|
yading@11: |     foo| -> |foo| + ||
yading@11: |      foo       | -> |foo| + ||
yading@11: |      foo     \ | -> |foo      | + ||
yading@11: |foo ':blah| -> |foo :blah| + ||
yading@11: | foo   bar    :   blahblah| -> |foo   bar| + |:   blahblah|
yading@11: |\f\o\o| -> |foo| + ||
yading@11: |'foo : \ \  '   : blahblah| -> |foo : \ \  | + |: blahblah|
yading@11: |'\fo\o:': blahblah| -> |\fo\o:| + |: blahblah|
yading@11: |\'fo\o\:':  foo  '  :blahblah| -> |'foo::  foo  | + |:blahblah|