fix the overtext extraction where overlaps start with an odd numbered…

… unit

exporter.py

@@ -122,6 +122,8 @@ def get_lemma_text(self, overtext, start, end):
         end = int(end)
         if start == end and start % 2 == 1:
             return ['', 'om']
+        if start % 2 == 1:
+            start += 1
         real_start = int(start/2)-1
         real_end = int(end/2)-1
         if real_start < 0:

tests_exporter.py

@@ -744,6 +744,14 @@ def test_get_lemma_text_defaults(self):
         generated_text = exp.get_lemma_text(overtext, '24', '24')
         self.assertEqual(expected_text, generated_text)
 
+        expected_text = ['αὐτοῦ ἐν ἐμοί ἵνα εὐαγγελίζωμαι αὐτὸν ἐν']
+        generated_text = exp.get_lemma_text(overtext, '7', '20')
+        self.assertEqual(expected_text, generated_text)
+
+        expected_text = ['αὐτοῦ ἐν ἐμοί ἵνα εὐαγγελίζωμαι αὐτὸν ἐν']
+        generated_text = exp.get_lemma_text(overtext, '8', '21')
+        self.assertEqual(expected_text, generated_text)
+
         # test where there is no data
         expected_text = ['', 'om']
         generated_text = exp.get_lemma_text(overtext, '27', '27')