Fix small mistake

Author: evagroenendijk

.pre-commit-config.yaml

@@ -1,7 +1,7 @@
 # See https://pre-commit.com for more information
 # See https://pre-commit.com/hooks.html for more hooks
 ci:
-  autofix_prs: false
+  autofix_prs: true
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v5.0.0

src/pineko/fonll.py

@@ -128,7 +128,7 @@ def theorycard_no_fns_pto(self):
                      continue
                 if card[key] != theorycards[0][key]:
                      differ.append(key)
-            del theorycards[0][key]
+                del theorycards[0][key]
 
             if len(differ) > 0:
                 raise ValueError(f"The following keys differ between different FONLL theory cards: {differ}")