string.fromFunction(fct, fmt) returns a string abbreviation for a function, including filepath, line numbers

string.fromValue(v, recurse, offset, prefix, suffix) -- enhancement of tostring function with more thorough handling of tables and functions

string.fromTable(src, recurse, offset, prefix, suffix, key_recurse): returns a single-line string representation of a table, including string representations of subtables and functions.  The recursion level for both keys and values can be set.  The converted string is lua source code compatible, depending on arguments.