Proper use of histdel()

[theo dodo]

Hi everybody,

I'd like to delete the last 100 entries in command line history. I've tried

call histdel(":", -100) and various alternatives using histdel() but I don't get it to work.

So far the only way I've discovered is directly editing _viminfo,

but that's a bit cumbersome.

Any suggestions from experts welcome!