Update documentation (#639)

Author: mandel

docs/tutorial.md

@@ -325,7 +325,7 @@ We support the following operations with the`regex` parser (indicated with the `
 
 - `findall`
 
-Here is an example that is using `findall`:
+Here is an example using the `findall` mode that returns the list `['1', '2', '3', '4']`:
 ```yaml
 --8<-- "./examples/tutorial/parser_findall.pdl"
 ```

examples/tutorial/parser_findall.pdl

@@ -1,4 +1,4 @@
-text: "1 -- 2 -- 3 -- 4"
+data: "1 -- 2 -- 3 -- 4"
 parser:
   regex: '[0-9]+'
   mode: findall

tests/results/examples/tutorial/parser_regex.1.result

@@ -0,0 +1,2 @@
+def add_numbers(a, b):
+    return a + b