Added script for generating the various check_equal combinations.
Changed check_equal error messages to include both vector and integer representations of the left and right operands when at least one operand is a vector. Made
vectors representations more readable by separating nibbles with underscore.
Removed overflow warnings from tb_string_ops.vhd when using exponentiation.
Added support for displaying the full vector representation of integers/naturals in check_equal error messages even when the vector with which the integer/natural is compared has a length shorter than what's needed to house the integer/natural.