bug#65117: Documentation nits

[Sevan Janiyan]

Hi there,
I setup Guix for the first time on an Armbian install today. I used the 
instruction in section 2 of the PDF to fetch the tar.xz archive and 
setup things manually.
There's 2 issues that I hit.
1) In step 5 of section 2.1, the documentation walks you through setting 
up systemd services. There is no guix-gc.timer in the archive that was 
downloaded, so this didn't work

cp ~root/.config/guix/current/lib/systemd/system/gnu-store.mount \
     ~root/.config/guix/current/lib/systemd/system/guix-daemon.service \
     /etc/systemd/system/


2) The generated PDF has backticks replaced with smart quotes, so in 
step 3 of section 2.1, instead of stating

GUIX_PROFILE="`echo ~root`/.config/guix/current" ; \
  source $GUIX_PROFILE/etc/profile

It states:

GUIX_PROFILE="‘echo ~root‘/.config/guix/current" ; \
  source $GUIX_PROFILE/etc/profile


Sevan