Merge bitcoin#18412: script: fix SCRIPT_ERR_SIG_PUSHONLY error string

41ff499 script: fix SCRIPT_ERR_SIG_PUSHONLY error string (Sebastian Falbesoner)

Pull request description:

  Fixes bitcoin#18411, changing the error message from `"Only non-push operators allowed in signatures"` to `"Only push operators allowed in signatures"`.

ACKs for top commit:
  laanwj:
    ACK 41ff499

Tree-SHA512: 3b75d83e2198d638d599ef6a4a8da986f0158600fe3f89f55b3759554588157acf2b0cba3f6a907164617264e7aee727d6d460b510c8b37ca7728aa79e11ad80

src/script/script_error.cpp

@@ -73,7 +73,7 @@ const char* ScriptErrorString(const ScriptError serror)
         case SCRIPT_ERR_MINIMALDATA:
             return "Data push larger than necessary";
         case SCRIPT_ERR_SIG_PUSHONLY:
-            return "Only non-push operators allowed in signatures";
+            return "Only push operators allowed in signatures";
         case SCRIPT_ERR_SIG_HIGH_S:
             return "Non-canonical signature: S value is unnecessarily high";
         case SCRIPT_ERR_SIG_NULLDUMMY: