diff --git a/j2o/__main__.py b/j2o/__main__.py
index efca7d7..8444a0b 100644
--- a/j2o/__main__.py
+++ b/j2o/__main__.py
@@ -139,7 +139,7 @@ def PRINT(*args):
             # o = {"text": None, "data_file": None, "data_descr": None}
             if o["text"] is not None:
                 if len(o["text"]) <= ORG_BABEL_MIN_LINES_FOR_BLOCK_OUTPUT:
-                    PRINT("#+RESULTS:" + (f"{i}_{k}" if k > 0 else "")) # add index for several RESULT
+                    PRINT("#+RESULTS:" + (f"{i}_{k}" if k > 0 else "")) # add index if there is several RESULT for one block
                     PRINT("".join([": " + t for t in o["text"]])) # .startswith()
                     PRINT()
                 else:
diff --git a/tests/draw-samples.org b/tests/draw-samples.org
index 3d1ad4b..7e50552 100644
--- a/tests/draw-samples.org
+++ b/tests/draw-samples.org
@@ -3,6 +3,8 @@ import h5py
 import matplotlib.pyplot as plt
 import numpy as np
 #+end_src
+: #-------------------------
+
 * Чтение файла
 #+begin_src python :results output :exports both :session s1
 with h5py.File('train/2021-01-train.hdf5', mode='r') as dataset:
@@ -12,6 +14,8 @@ with h5py.File('train/2021-01-train.hdf5', mode='r') as dataset:
 : ['1609459200', '1609459800', '1609460400', '1609461000', '1609461600', '1609462200', '1609462800', '1609463400', '1609464000', '1609464600']
 
 
+: #-------------------------
+
 #+begin_src python :results output :exports both :session s1
 with h5py.File('train/2021-01-train.hdf5', mode='r') as dataset:
     print(list(dataset['1609459200'].keys()))
@@ -20,6 +24,8 @@ with h5py.File('train/2021-01-train.hdf5', mode='r') as dataset:
 : ['events', 'intensity', 'radial_velocity', 'reflectivity']
 
 
+: #-------------------------
+
 #+begin_src python :results output :exports both :session s1
 with h5py.File('train/2021-01-train.hdf5', mode='r') as dataset:
     print(f"events shape: {dataset['1609459200']['events'].shape}")
@@ -34,6 +40,8 @@ with h5py.File('train/2021-01-train.hdf5', mode='r') as dataset:
 : reflectivity shape: (10, 252, 252)
 
 
+: #-------------------------
+
 * Визуализация
 #+begin_src python :results output :exports both :session s1
 events = []
@@ -63,6 +71,8 @@ radial_velocity[radial_velocity == -1e6] = -1
 reflectivity[reflectivity == -2e6] = -2
 reflectivity[reflectivity == -1e6] = -1
 #+end_src
+: #-------------------------
+
 ** Погодные события
 #+begin_src python :results file graphics :file /tmp/a-a-imgs/8_0.png :exports both :session s1
 _, axs = plt.subplots(1, len(events), figsize=(20, 2))
@@ -73,6 +83,8 @@ for index in range(len(events)):
 #+RESULTS:
 [[file:/tmp/a-a-imgs/8_0.png]] <Figure size 1440x144 with 6 Axes>
 
+: #-------------------------
+
 ** Интенсивность осадков
 #+begin_src python :results file graphics :file /tmp/a-a-imgs/10_0.png :exports both :session s1
 _, axs = plt.subplots(1, len(intensity), figsize=(20, 2))
@@ -83,6 +95,8 @@ for index in range(len(intensity)):
 #+RESULTS:
 [[file:/tmp/a-a-imgs/10_0.png]] <Figure size 1440x144 with 6 Axes>
 
+: #-------------------------
+
 ** Радиальная скорость по высотам
 #+begin_src python :results file graphics :file /tmp/a-a-imgs/12_0.png :exports both :session s1
 _, axs = plt.subplots(10, len(radial_velocity), figsize=(20, 20))
@@ -96,6 +110,8 @@ for index in range(len(radial_velocity)):
 #+RESULTS:
 [[file:/tmp/a-a-imgs/12_0.png]] <Figure size 1440x1440 with 60 Axes>
 
+: #-------------------------
+
 ** Отражаемость по высотам
 #+begin_src python :results file graphics :file /tmp/a-a-imgs/14_0.png :exports both :session s1
 _, axs = plt.subplots(10, len(reflectivity), figsize=(20, 20))
@@ -109,3 +125,5 @@ for index in range(len(reflectivity)):
 #+RESULTS:
 [[file:/tmp/a-a-imgs/14_0.png]] <Figure size 1440x1440 with 60 Axes>
 
+: #-------------------------
+
diff --git a/tests/test_main.py b/tests/test_main.py
index bbce39d..93c408e 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -1,3 +1,8 @@
+# steps to fix errors:
+# $ python3 -m pytest
+# diff /tmp/a.org tests/draw-samples.org
+# mv /tmp/a.org tests/draw-samples.org
+
 from filecmp import cmp
 import os