Update README.md to disambiguate shell elevation.

README.md

@@ -7,8 +7,9 @@
 
 **gsudo** is a `sudo` equivalent for Windows, with a similar user-experience as the original Unix/Linux sudo.
 Allows you to run a command with elevated permissions, or to elevate the current shell, in the current console window or a new one.
-
-Just [prepend `gsudo`](#usage) (or the `sudo` alias) to your command and it will run elevated. For PowerShell use `gsudo { ScriptBlock }` [syntax](#usage-from-powershell--powershell-core). 
+Allows you to run a command (or re-launch your current shell) with elevated permissions, in the current console window or a new one.
+
+Just [prepend `gsudo`](#usage) (or the `sudo` alias) to your command and it will run elevated. For PowerShell use this [syntax](#usage-from-powershell--powershell-core): `gsudo { ScriptBlock }`
 
 One UAC popup will appear each time. You can see less popups if you enable [gsudo cache](#credentials-cache).