- Adapt from_engineering_string() to accept an empty separator and variable-length SI prefixes, such as a UTF-8 encoded micro, "\xce\xbc" (Thanks to Josh Kelley)
- Add separator parameter to to_engineering_string()
- Failing test: test_eng_format.cpp:115: from_engineering_string() needs adaptation to support empty separator, e.g. "1k"
- Start version numbering
- Failing test: test_eng_format.cpp:145: formats as '-1000.000e-27', should be "-1.00000 y"
- Failing test: test_eng_format.cpp:158: formats as '100.0 z', should be "100 z"