Something I learnt today is that when you are passing flags into a command line application, both these syntaxes are equivalent.
subql-node --log-level=debug subql-node --log-level debug
What is also interesting is that there are lots of other conventions such as combining all the flags together with no space.
program -a -b -c program -abc
For more information refer to this useful article: https://nullprogram.com/blog/2020/08/01/