Am I making the right changes?

Question

linux

Initial value
GRUB_CMDLINE_LINUX_DEFAULT="splash quiet "
Making changes

GRUB_CMDLINE_LINUX_DEFAULT="splash quiet intel_idle.max_cstate=1"

There is a space in the initial value at the end of the line, do I need to add it to my changes?

Answer 1

Not needed. In my opinion, for GRUB it doesn't matter how many spaces there are between the parameters.
I have here

quiet noiswmd nokmsboot resume=UUID=5c6a263d-12da-4bcb-8374-0938073a203d audit=0 rootfstype=ext4 libahci.ignore_sss=1 raid=noautodetect selinux=0 plymouth.enable=0 lpj=3399122

and without any spaces at the end, and it works, the last parameter is taken into account.

[[email protected] ~]$ dmesg |grep lpj
...
[    0.070606] Calibrating delay loop (skipped) preset value.. 6798.24 BogoMIPS (lpj=3399122)
[[email protected] ~]$