Clean up comments and variable names prior to merge.

FossilOrigin-Name: 6445519e91c4f98b4a9a45d5091d733c31497ebf0eb23a76edce3091f626035d
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 4dd58d3..eba52b6 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -3840,7 +3840,7 @@
 void sqlite3CloseSavepoints(sqlite3 *);
 void sqlite3LeaveMutexAndCloseZombie(sqlite3*);
 int sqlite3ExprIdToTrueFalse(Expr*);
-int sqlite3ExprTruthOperand(const Expr*);
+int sqlite3ExprTruthValue(const Expr*);
 int sqlite3ExprIsConstant(Expr*);
 int sqlite3ExprIsConstantNotJoin(Expr*);
 int sqlite3ExprIsConstantOrFunction(Expr*, u8);