fix: small fixes

internal/agent/terminal.go

@@ -15,7 +15,7 @@ type PTY struct {
 }
 
 // StartPTY launches a login shell attached to a new PTY. With user empty (or
-// equal to the agent's own user) it is the agent's shell — root by default,
+// equal to the agent's own user) it is the agent's shell - root by default,
 // since the agent runs as a root systemd service. Any other user is entered via
 // `su -l`, which only a root agent can do without a password.
 func StartPTY(user string) (*PTY, error) {