Update wsl-config.md (#146)

* Update wsl-config.md

wsl -c [command] needs to be changed to wsl [command]. This invocation convention is a bit finicky.

* Update wsl-config.md

Author: cwilhit

commandline/WSL/wsl-config.md

@@ -46,10 +46,10 @@ Lists all distributions, including ones that aren't currently usable.  They may
 There are three ways to launch and run WSL:
 
 1. `wsl.exe` or `bash.exe`
-1. `wsl -c [command]` or `bash -c [command]`
+1. `wsl [command]` or `bash -c [command]`
 1. `[distro]` ie `ubuntu` -- this is the same as launching the installed app from the Windows menu.
 
-In the first two cases, WSL must pick a distribution to run - a default distribution.  If you don't explicitly set a default, it will be the first one installed.
+In the first two cases, WSL must pick a distribution to run - a default distribution.  If you don't explicitly set a default, it will be the first one installed. Please note that when appending a command and invoking via 'wsl', you don't append a '-c' for the command.
 
 `wslconfig /setdefault <DistributionName>`  
 Sets the default distribution to `<DistributionName>`.