no splitlines

Author: AA-Turner

Lib/textwrap.py

@@ -433,7 +433,7 @@ def dedent(text):
     if text.isspace():
         return '\n' * text.count('\n')
 
-    lines = text.splitlines()
+    lines = text.split('\n')
 
     # Get length of leading whitespace, inspired by ``os.path.commonprefix()``
     non_blank_lines = [l for l in lines if l and not l.isspace()]