pages/*: fix small typos (#11831)

* pages/*: fix small typos

* Update ssh-copy-id.md

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

* ansible-inventory: fix typo

* Update pages/linux/zathura.md

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

* gcloud: fix typo

* fdesetup: mark as placeholder

* icalbuddy: use general placeholder

* ip: make it a placeholder

* git-svn: fix typo

* pages/*: fix typos

* kubectl-get: add mnemonics and long options

* kubectl-describe: add mnemonics and long options

* pip-install: use short option

* Update icalbuddy.md

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

---------

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/linux/ip.md

@@ -26,7 +26,7 @@
 
 - Make an interface up/down:
 
-`ip link set {{interface}} up/down`
+`ip link set {{interface}} {{up|down}}`
 
 - Add/Delete an IP address to an interface: