More like putting a post-it on the ads in magazines. You are not altering anything for the next person, or even for yourself after reloading a page.

Was a theory i had as well, but copied whatever was there, and even afterwards ran git submodule init && git submodule update (from the docker install section), but all without luck.

It’s just their preferred type of weaponry that made its way (through memes) into the lore. Exactly as @Kerb@discuss.tchncs.de says, the Krieg (Krieg even means ‘war’ in German) are based on WW1 trench warfare and 40K has taken this to the extreme (as with everything)