lib/Tools/dotnet

--- a/lib/Tools/dotnet	Sat Nov 05 22:35:20 2022 +0100
+++ b/lib/Tools/dotnet	Sat Nov 05 22:38:56 2022 +0100
@@ -5,7 +5,7 @@
 # DESCRIPTION: invoke the dotnet CLI driver within the Isabelle environment
 
 if [ -z "$ISABELLE_DOTNET" ]; then
-  echo "Missing dotnet installation: use \"isabelle dotnet_setup\" first" >&2
+  echo "Missing dotnet installation: need to run \"isabelle dotnet_setup\" first" >&2
   exit 2
 else
   exec "$ISABELLE_DOTNET" "$@"