move c-from c-to ucount -- core ``move''
erase addr len -- core-ext ``erase''
While the previous words work on address units, the rest works on characters.
cmove c-from c-to u -- string ``cmove''
cmove> c-from c-to u -- string ``c-move-up''
fill c-addr u c -- core ``fill''
blank addr len -- string ``blank''
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