consider empty lines as part of the indented block

Author: anandology

web/template.py

@@ -392,17 +392,22 @@ def read_indented_block(self, text, indent):
  ('a\nb\n', 'c')
  >>> read_indented_block(' a\n b\n c\nd', ' ')
  ('a\n b\nc\n', 'd')
+ >>> read_indented_block(' a\n\n b\nc', ' ')
+ ('a\n\n b\n', 'c')
  """
  if indent == '':
  return '', text
 
  block = ""
- while True:
- if text.startswith(indent):
- line, text = splitline(text)
+ while text:
+ line, text2 = splitline(text)
+ if line.strip() == "":
+ block += '\n'
+ elif line.startswith(indent):
  block += line[len(indent):]
  else:
  break
+ text = text2
  return block, text
 
  def read_statement(self, text):
@@ -526,7 +531,7 @@ def emit(self, indent):
 
  def __repr__(self):
  return 't' + repr(self.value)
- 
+
 class ExpressionNode:
  def __init__(self, value, escape=True):
  self.value = value.strip()