Increase max line within help file from 132 to 512, to allow for
multiple backslash-coded items.
Fixed MEMO DELETE to release memory location after delete.
Memo editor now keeps track of the desired column when moving
vertically through shorter lines.
Having an extraneous comma within a DECLARE statement would cause
an erroneous syntax error at the first reference to a literal. ie:
DECLARE variable1, variable2,
or DECLARE variable1,, variable2
MEMO EDIT / MEMO SHOW can now leave off the (row,col,...) entirely,
and a default location/size will be used.
Fix *cabe DEL problems under Unix/Linux.