I use global-display-line-number-mode in my init.el. When I use emacsclient
open first buffer, no matter which mode it is, line number does not show.
I can manually enable it by M-x display-line-number-mode. If I open other
file during my first buffer, different buffer mode, line number shows.

If not use emacsclient, no problem.

Thank you
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written by ccQ