Renames all columns and parameters in the input table so that they have names which have convenient syntax for STILTS. For the most part this means replacing spaces and other non-alphanumeric characters with underscores. This is a convenience which lets you use column names in algebraic expressions and other STILTS syntax.
Additionally, column names are adjusted if necessary to ensure
that they are all unique when compared case-insensitively.
If the names are all unique to start with
then no changes are made,
but if for instance two columns exist with names
one of them will be altered
(for instance to