mass change: apply snake case to tokens (#2518)

pages/linux/flatpak.md

@@ -20,7 +20,7 @@
 
 - Add a remote source:
 
-`flatpak remote-add --if-not-exists {{remote-name}} {{remote-url}}`
+`flatpak remote-add --if-not-exists {{remote_name}} {{remote_url}}`
 
 - List all configured remote sources:
 

pages/linux/strace.md

@@ -8,7 +8,7 @@
 
 - Trace a process and filter output by system call:
 
-`strace -p {{pid}} -e {{system call name}}`
+`strace -p {{pid}} -e {{system_call_name}}`
 
 - Count time, calls, and errors for each system call and report a summary on program exit:
 

pages/linux/xsetwacom.md

@@ -8,16 +8,16 @@
 
 - Set Wacom area to specific screen. Get name of the screen with `xrandr`:
 
-`xsetwacom set "{{device name}}" MapToOutput {{screen}}`
+`xsetwacom set "{{device_name}}" MapToOutput {{screen}}`
 
 - Set mode to relative (like a mouse) or absolute (like a pen) mode:
 
-`xsetwacom set "{{device name}}" Mode "{{Relative|Absolute}}"`
+`xsetwacom set "{{device_name}}" Mode "{{Relative|Absolute}}"`
 
 - Rotate the input (useful for tablet-PC when rotating screen) by 0|90|180|270 degrees from "natural" rotation:
 
-`xsetwacom set "{{device name}}" Rotate {{none|half|cw|ccw}}`
+`xsetwacom set "{{device_name}}" Rotate {{none|half|cw|ccw}}`
 
 - Set button to only work when the tip of the pen is touching the tablet:
 
-`xsetwacom set "{{device name}}" TabletPCButton "on"`
+`xsetwacom set "{{device_name}}" TabletPCButton "on"`