Formula docs: concat example parses

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AjsYaRkTHNKszSHjd3j264

Author: claude

lib/src/utils/formula.dart

@@ -293,7 +293,7 @@ class FormulaEvaluator {
     FormulaFunctionDoc(
       'concat',
       'concat(list, list or value, ...)',
-      'concat(take(history, 23), [soc]); history + [soc] does the same',
+      'concat(take(history, 23), [soc])',
     ),
     FormulaFunctionDoc(
       'alpha',