add newline to keyfile if needed

external/cmd/helpers/createkeyfile/main.go

@@ -76,12 +76,13 @@ func main() {
 		quit(fmt.Sprintf("file contents look wrong: %s", string(stdin)), 8)
 	}
 
-	n, err = f.Write(stdin)
+	_, err = f.Write(stdin)
 	if err != nil {
 		quit(err.Error(), 9)
-	} else if n == 0 {
-		quit("wrote nothing to keyfile", 10)
 	}
+
+	_, err = f.WriteString("\n")
+
 }
 
 /*

external/cmd/welcome/main.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"os"
 	"os/exec"
+	"strings"
 	"time"
 
 	"git.tilde.town/tildetown/town/invites"
@@ -205,12 +206,16 @@ func createUser(data newUserData) (err error) {
 }
 
 func keyfileText(data newUserData) string {
+	pkey := data.PubKey
+	if !strings.HasSuffix(pkey, "\n") {
+		pkey += "\n"
+	}
 	header := `########## GREETINGS! ##########
 # This file was automatically generated by tilde.town when
 # your account was created. You can edit it if you want, but we
 # recommend adding stuff to ~/.ssh/authorized_keys instead.`
 
-	return fmt.Sprintf("%s\n%s", header, data.PubKey)
+	return fmt.Sprintf("%s\n%s", header, pkey)
 }
 
 func main() {