Update cheatsheets

tldr/linux/whatis

@@ -15,16 +15,16 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Don't cut the description off at the end of the line:
 
-`whatis --long {{command}}`
+`whatis {{[-l|--long]}} {{command}}`
 
 - Display descriptions for all commands matching a glob:
 
-`whatis --wildcard {{net*}}`
+`whatis {{[-w|--wildcard]}} {{net*}}`
 
 - Search man page descriptions with a `regex`:
 
-`whatis --regex '{{wish[0-9]\.[0-9]}}'`
+`whatis {{[-r|--regex]}} '{{wish[0-9]\.[0-9]}}'`
 
 - Display descriptions in a specific language:
 
-`whatis --locale={{en}} {{command}}`
+`whatis {{[-L|--locale]}} {{en}} {{command}}`