Add new options "uppercase", "lowercase" to format() command. * NEWS: Announce change, and removal of 'E' and 'G' format options. * pr-output.cc: Rename static variable "print_big_e" to "uppercase_format". * pr-output.cc (operator << (pr_engineering_float): Print "E" or "e" to output stream depending on value of uppercase_format. * pr-output.cc (make_real_format, make_real_matrix_format, make_complex_format, make_complex_matrix_format, make_range_format): Set uppercase member variable in variable "fmt" if uppercase_format is true. * pr-output.cc (pr_any_float, pr_int): When printing hex format, add std::ios::uppercase to stream flags if uppercase_format is true. * pr-output.cc (init_format_state): Delete "print_big_e" which no longer exists. * pr-output.cc (set_format_style): Use std::transform and tolower to lowercase input format argument. Remove tests for 'E', 'G', 'shortE', 'shortG', 'longE, 'longG' formats. Add new decodes for "uppercase", "lowercase" which set uppercase_format variable. * pr-output.cc (Fformat): Redo documentation to have third output from function, to remove 'E' and 'G' formats, and to document "uppercase" & "lowercase" options. Declare intermediate variable nargin to hold args.length() to for code readability. Return variable uppercase_format if called with 3 or more output arguments. Redo BIST tests for new behavior.