message: Fix minor typo (triggered a GCC warning, NFC)
diff: @@ -95,7 +95,7 @@ private:
  /// a plain walk over operations to match flat patterns but the current
  /// implementation is competitive nonetheless.
  using FilterFunctionType = std::function<bool(Operation &)>;
  -static bool defaultFilterFunction(Operation &) { return true; };
  +static bool defaultFilterFunction(Operation &) { return true; }
  struct NestedPattern {
  NestedPattern(ArrayRef<NestedPattern> nested,
  FilterFunctionType filter = defaultFilterFunction);
  