I have noticed that when running 'cat' to look at certain files that for some reason the end of the file is in a different embolden colour, which then makes all of my Terminal text that colour as well as bold.

An example is when I ran: cat /bin/systemd-ask-password

And this is what happened (Bold_Red_Terminal_Cat_Command.bmp):

And this is the colour that I should be seeing (Terminal_prompt_normal.bmp):

And the only way to get rid of the strange styling change and to return to normal appears to be to restart Terminal or to view a file which does not have this very strange effect.