Added support for single-line simulation command

[christian-krieg]

• PulseView generates VCD files with value changes on the same line as the time stamp, separated by white-space
• Not sure if standard-compliant, but added support for it as GTKWave also supports it
• Added a test to the testbench

[christian-krieg]

friendly ping :)

[cirosantilli]

Thanks Christian, merged. I wish we could handle the vector changes too, but lazy to do it :-) If only there was a convenient builtin way to make readline read until any whitespace instead: https://stackoverflow.com/questions/47927039/reading-a-file-until-a-specific-character-in-python

[christian-krieg]

Thank you so much, Ciro! Probably we'll add support for the vector changes once we desperately need it :D

Cheers, Christian