fix example

docs/userGuide/userGuide.tex

@@ -220,7 +220,7 @@ execute cli::builtin::ReadFile ../examples2/automaton/DFA.txt | string::Parse au
 ./aql2 -q 'execute automaton::simplify::efficient::EpsilonRemoverIncoming <\#stdin | automaton::determinize::Determinize - | automaton::simplify::Trim - | automaton::simplify::Minimize - | automaton::simplify::Normalize - >\#stdout'
 \noindent
-echo "a + a" | ./aql2 -q "execute cli::builtin::ReadFile #stdin | string::Parse regexp::RegExp \^{} - | regexp::convert::ToAutomatonGlushkov (UnboundedRegExp) -"
+echo 'a + a' | ./aql2 -q 'execute cli::builtin::ReadFile \#stdin | string::Parse regexp::RegExp \^{} - | regexp::convert::ToAutomatonGlushkov (UnboundedRegExp) -'
 \backmatter