Gracefully degrade if previously edited file shrinks.
G5HANZBIJLPNT3NAW5U2UJYV3SMFIJVVPESJ7JBBYWLZ3XMMJOGAC
YGCT2D2ORMLTBHANLGHZV3EBGGHD7ZK55UAM7HF2AVSHDXAAKK5QC
OTIBCAUJ3KDQJLVDN3A536DLZGNRYMGJLORZVR3WLCGXGO6UGO6AC
if Lines[Cursor1.line].mode ~= 'text' then
if Cursor1.line > #Lines or Lines[Cursor1.line].mode ~= 'text' then