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editingwiththebasiceditor
Entering text into the block is easy. Type the line number and
then the new contents of the line. For instance, to replace line
9 with "Hello" (sans quotes):
9 Hello
Run +list to see your changes.
When you are happy with the edits, run +save to write the block
to storage. If you need to revert to the currently saved copy,
run +load .