diff --git a/doc/generic/pgf/lib/examplewithoptionfinder.lua b/doc/generic/pgf/lib/examplewithoptionfinder.lua
index 5560b4a2f..3286eec50 100644
--- a/doc/generic/pgf/lib/examplewithoptionfinder.lua
+++ b/doc/generic/pgf/lib/examplewithoptionfinder.lua
@@ -10,25 +10,19 @@ if UNIT_TESTING then
     package.path = pwd() .. "?.lua;" .. package.path
     local luarocks_path = os.getenv("HOME") .. "/.luarocks/share/lua/5.3/?.lua"
     package.path = package.path .. ";" .. luarocks_path
-    print("package.path: " .. package.path)
+-- print("package.path: " .. package.path)
 -- local tostring = require "ml".tstring
 end
 
 local lpeg = require("lpeg")
 local loc = lpeg.locale()
--- local u = require("utils")
+local u = require("utils")
 local str = require("stringmatcher")
 local C, Ct, P, V = lpeg.C, lpeg.Ct, lpeg.P, lpeg.V
 
 local t = {}
 local SP = loc.space ^ 0
 
-local result = {}
-local function keyval(key, val)
-    result[key] = val
-    return result
-end
-
 -- local function sanitize(matches)
 --     if type(matches) == "table" then
 --         return matches
@@ -55,10 +49,12 @@ t.grammar =
     example_begin = P "\n" ^ -1 * "example({" * SP,
     example_end = "\n})" * SP,
     -- content = C((1 - V "example_end") ^ 0),
-    content = Ct(V "options" ^ -1 * V "code"),
+    content = Ct(lpeg.Cf(Ct "" * V "options" ^ -1 * V "code", u.set)),
     anything = (1 - V "example") ^ 0,
-    options = SP * C("options") * SP * "=" * str ^ -1 * (P ",") ^ -1 / keyval,
-    code = SP * C("code") * SP * "=" * str / keyval
+    options = SP * (V "optionskv") ^ -1 * (P ",") ^ -1,
+    optionskv = lpeg.Cg(C("options") * SP * "=" * str),
+    code = SP * V "codekv",
+    codekv = lpeg.Cg(C("code") * SP * "=" * str)
 }
 
 local function preamble(options)
@@ -88,8 +84,7 @@ if UNIT_TESTING then
     local test_options = [[ preamble=\usetikzlibrary{graphs,graphdrawing} \usegdlibrary{layered} ]]
     local p = SP * P "preamble" * SP * "=" * SP * C(P(1) ^ 1)
     local matches = p:match(test_options)
-    print("type(matches)", type(matches))
-    print("to_string(p:match(test_options)):", tostring(p:match(test_options)))
+    assert(matches == [[\usetikzlibrary{graphs,graphdrawing} \usegdlibrary{layered} ]])
     -- os.exit()
 
     -- local tostring = require "ml".tstring
@@ -119,8 +114,24 @@ example({
     -- local result = t.grammar:match(mini_test_case)
     -- print("captured:", captured)
     -- print("tostring(result): ", tostring(matches[1]))
-    print("t.get_options(matches):", tostring(t.get_options(matches)))
-    print("t.get_content(matches):", t.get_content(matches))
+    assert(#matches == 1)
+    local e = matches[1]
+    assert(tostring(t.get_options(e)) == [[{preamble="\\usetikzlibrary{graphs,graphdrawing} \\usegdlibrary{layered"}]])
+    -- print("t.get_content(matches):", t.get_content(e))
+    assert(
+        u.strip(t.get_content(e)) ==
+            u.strip(
+                [[
+   \begin{tikzpicture}
+      \draw [help lines] (0,0) grid (2,2);
+
+      \graph [layered layout, edges=rounded corners]
+        { a -- {b, c [anchor here] } -- d -- a};
+    \end{tikzpicture
+]]
+            )
+    )
+
     -- print("captured.options:", captured.options)
     -- print("captured.code:", captured.code)
     -- print("result.options:", result.options)