Fix quote escape in literals

core/translate/expr.rs

@@ -1854,7 +1854,7 @@ pub fn translate_expr(
             }
             ast::Literal::String(s) => {
                 program.emit_insn(Insn::String8 {
-                    value: s[1..s.len() - 1].to_string(),
+                    value: s[1..s.len() - 1].replace("''", "'").to_string(),
                     dest: target_register,
                 });
                 Ok(target_register)

testing/select.test

@@ -11,6 +11,10 @@ do_execsql_test select-const-2 {
   SELECT 2
 } {2}
 
+do_execsql_test select-text-escape-1 {
+  SELECT '''a'
+} {'a}
+
 do_execsql_test select-blob-empty {
   SELECT x'';
 } {}