(chocolateyGH-293) Upgrade all except additional documentation

src/chocolatey/infrastructure.app/commands/ChocolateyUpgradeCommand.cs

@@ -86,7 +86,7 @@ public virtual void configure_argument_parser(OptionSet optionSet, ChocolateyCon
                      "Password - the user's password to the source. Defaults to empty.",
                      option => configuration.SourceCommand.Password = option.remove_surrounding_quotes())
                 .Add("except=",
-                     "Except - a comma-separated list of package names that should not be upgraded. Defaults to empty.",
+                     "Except - a comma-separated list of package names that should not be upgraded when upgrading 'all'. Defaults to empty.",
                      option => configuration.UpgradeCommand.PackageNamesToSkip = option.remove_surrounding_quotes())
                 ;
         }
@@ -131,6 +131,8 @@ choco upgrade notepadplusplus googlechrome atom 7zip -dvfy
     choco upgrade nodejs.install --version 0.10.35
     choco upgrade git -s ""https://somewhere/out/there""
     choco upgrade git -s ""https://somewhere/protected"" -u user -p pass
+    choco upgrade all
+    choco upgrade all --except=""skype,conemu""
 ");
 
             "chocolatey".Log().Info(ChocolateyLoggers.Important, "Options and Switches");