systemd tools: add option placeholders (#17001)

pages/linux/coredumpctl.md

@@ -25,8 +25,8 @@
 
 - Extract the last core dump of a program to a file:
 
-`coredumpctl --output {{path/to/file}} dump {{program}}`
+`coredumpctl {{[-o|--output]}} {{path/to/file}} dump {{program}}`
 
 - Skip debuginfod and pagination prompts and then print the backtrace when using `gdb`:
 
-`coredumpctl debug --debugger-arguments "-iex 'set debuginfod enabled on' -iex 'set pagination off' -ex bt"`
+`coredumpctl debug {{[-A|--debugger-arguments]}} "-iex 'set debuginfod enabled on' -iex 'set pagination off' -ex bt"`

pages/linux/resolvectl.md

@@ -26,7 +26,7 @@
 
 - Retrieve an MX record of a domain:
 
-`resolvectl --legend={{no}} --type={{MX}} query {{domain}}`
+`resolvectl --legend {{no}} {{[-t|--type]}} {{MX}} query {{domain}}`
 
 - Resolve an SRV record, for example _xmpp-server._tcp gmail.com:
 

pages/linux/udevadm.md

@@ -9,19 +9,19 @@
 
 - Print `uevents` sent out by the kernel:
 
-`sudo udevadm monitor --kernel`
+`sudo udevadm monitor {{[-k|--kernel]}}`
 
 - Print device events after being processed by `udev`:
 
-`sudo udevadm monitor --udev`
+`sudo udevadm monitor {{[-u|--udev]}}`
 
 - List attributes of device `/dev/sda`:
 
-`sudo udevadm info --attribute-walk {{/dev/sda}}`
+`sudo udevadm info {{[-a|--attribute-walk]}} {{/dev/sda}}`
 
 - Reload all `udev` rules:
 
-`sudo udevadm control --reload`
+`sudo udevadm control {{[-R|--reload]}}`
 
 - Trigger all `udev` rules to run: