Restore "text" attr to .textboxhorizontal/etc.

Fix regression introduced in 9587cc7 / v0.6.2.

pdfplumber/page.py

@@ -23,6 +23,7 @@
     LTLine,
     LTPage,
     LTRect,
+    LTTextContainer,
 )
 from pdfminer.pdfinterp import PDFPageInterpreter
 from pdfminer.pdfpage import PDFPage
@@ -211,8 +212,10 @@ def process_attr(item: Tuple[str, Any]) -> Optional[Tuple[str, Any]]:
         attr["object_type"] = kind
         attr["page_number"] = self.page_number
 
-        if isinstance(obj, LTChar):
+        if isinstance(obj, (LTChar, LTTextContainer)):
             attr["text"] = obj.get_text()
+
+        if isinstance(obj, LTChar):
             gs = obj.graphicstate
             attr["stroking_color"] = gs.scolor
             attr["non_stroking_color"] = gs.ncolor

tests/test_laparams.py

@@ -26,6 +26,8 @@ def test_with_laparams(self):
             page = pdf.pages[0]
             assert len(page.textboxhorizontals) == 27
             assert len(page.textlinehorizontals) == 79
+            assert "text" in page.textboxhorizontals[0]
+            assert "text" in page.textlinehorizontals[0]
             assert len(page.chars) == 4408
             assert "anno" not in page.objects.keys()
 
@@ -38,6 +40,8 @@ def test_vertical_texts(self):
             assert len(page.textboxhorizontals) == 74
             assert len(page.textlineverticals) == 11
             assert len(page.textboxverticals) == 6
+            assert "text" in page.textboxverticals[0]
+            assert "text" in page.textlineverticals[0]
 
     def test_issue_383(self):
         with pdfplumber.open(self.path, laparams={}) as pdf: