xbps*: add option placeholders (#16548)

pages/linux/xbps-install.md

@@ -10,4 +10,4 @@
 
 - Synchronize and update all packages:
 
-`xbps-install --sync --update`
+`xbps-install {{[-S|--sync]}} {{[-u|--update]}}`

pages/linux/xbps-query.md

@@ -6,20 +6,20 @@
 
 - Search for a package in remote repositories using a regular expression or a keyword (if `--regex` is omitted):
 
-`xbps-query --search {{regular_expression|keyword}} --repository --regex`
+`xbps-query {{[-s|--search]}} {{regular_expression|keyword}} --repository --regex`
 
 - Show information about an installed package:
 
-`xbps-query --show {{package}}`
+`xbps-query {{[-S|--show]}} {{package}}`
 
 - Show information about a package in remote repositories:
 
-`xbps-query --show {{package}} --repository`
+`xbps-query {{[-S|--show]}} {{package}} --repository`
 
 - List packages registered in the package database:
 
-`xbps-query --list-pkgs`
+`xbps-query {{[-l|--list-pkgs]}}`
 
 - List explicitly installed packages (i.e. not automatically installed as dependencies):
 
-`xbps-query --list-manual-pkgs`
+`xbps-query {{[-m|--list-manual-pkgs]}}`

pages/linux/xbps-remove.md

@@ -10,12 +10,12 @@
 
 - Remove a package and its dependencies:
 
-`xbps-remove --recursive {{package}}`
+`xbps-remove {{[-R|--recursive]}} {{package}}`
 
 - Remove orphan packages (installed as dependencies but no longer required by any package):
 
-`xbps-remove --remove-orphans`
+`xbps-remove {{[-o|--remove-orphans]}}`
 
 - Remove obsolete packages from the cache:
 
-`xbps-remove --clean-cache`
+`xbps-remove {{[-O|--clean-cache]}}`