Allow escaped quotation marks in item_name

c4mate

@@ -102,7 +102,7 @@ function MatePad:parse_log(size)
     -- Then extract and print oldbalance, newbalance, parameter and method.
     -- Depending on method, print either reason or item_name. If any extraction
     -- fails we fail with exit code 1.
-    -- Note: we allow quoted quotation marks in "reason".
+    -- Note: we allow escaped quotation marks in "reason" and "item_name".
     pipe = io.popen(string.format([=[
 curl %s --header "Accept: application/json" "%s/api/user/%s/log?type=json" | \
 sed -n --sandbox '
@@ -135,7 +135,7 @@ sed -n '
         b
     }
     g
-    s/.*"item_name" *: *\(null\|"\([^"]*\)"\).*/\2/p
+    s/.*"item_name" *: *\(null\|"\(\([^"]\|\\"\)*[^\\]\)"\).*/\2/p
     T fail
     b
     :fail