Update cheatsheets

tldr/linux/dex

@@ -14,15 +14,15 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Execute all programs in the specified folders:
 
-`dex {{[-a|--autostart]} {{[-s|--search-paths]}} {{path/to/directory1}}:{{path/to/directory2}}:{{path/to/directory3}}:`
+`dex {{[-a|--autostart]}} {{[-s|--search-paths]}} {{path/to/directory1}}:{{path/to/directory2}}:{{path/to/directory3}}:`
 
 - Preview the programs would be executed in a GNOME specific autostart:
 
-`dex {{[-a|--autostart]} {{[-e|--environment]}} {{GNOME}}`
+`dex {{[-a|--autostart]}} {{[-e|--environment]}} {{GNOME}}`
 
 - Preview the programs would be executed in a regular autostart:
 
-`dex {{[-a|--autostart]} {{[-d|--dry-run]}}`
+`dex {{[-a|--autostart]}} {{[-d|--dry-run]}}`
 
 - Preview the value of the DesktopEntry property `Name`:
 

tldr/linux/fwupdmgr

@@ -28,3 +28,7 @@ source: https://github.com/tldr-pages/tldr.git
 - Remount `/boot` with more privileges if update complains about a read-only filesystem:
 
 `sudo mount {{[-o|--options]}} uid=1000,gid=1000,umask=0022 {{/dev/sdX}} /boot`
+
+- Show firmware update history:
+
+`fwupdmgr get-history`

tldr/linux/instaloader

@@ -39,4 +39,4 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Download all types of posts (login required):
 
-`instaloader {{[-l|--login]}} {{username}} {{[-p|--password]}} {{password}} {[-s|--stories]}} --igtv --highlights {{profile_name}}`
+`instaloader {{[-l|--login]}} {{username}} {{[-p|--password]}} {{password}} {{[-s|--stories]}} --igtv --highlights {{profile_name}}`

tldr/linux/lxc-start

@@ -18,7 +18,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Start a container in the foreground:
 
-`sudo lxc-start {{container_name}} {{[-F|--foreground]]}`
+`sudo lxc-start {{container_name}} {{[-F|--foreground]}}`
 
 - Exit out of a foreground container (run this in a separate terminal):