Fixed misaligned paddings when formats other than prefixed hex are used

[firefish111]

When a line is shorter than the specifies column width (-c), and padding is required, the padding amount per byte was hardcoded to 5, which corresponds to the width of one prefixed hex byte plus a space. This causes misalignment when other formattings are used.

This fix selects the appropriate padding width based on the format type.

[firefish111]

Just committed to fix the linter errors

[firefish111]

Added a unit test to check for misaligned padding