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minicom's vt220 implementation was improperly displaying half of cvvis. It seems it can't handle CPI codes separated by ;, and fails to ignore the unknown escape. This simplifies it, but it still does what we want (the cvvis we were using, taken from terminfo for xterm, was additionally doing an 'echo on', which we don't need). Additionally I received feedback about the spinner being nastier than the old slash-based one, so I moved to that. ... some day I might make that customisable :-)