PY-25639 "Convert to Jupyter Notebook" removed all line breaks in code.

python/helpers/py2ipnb_converter.py

@@ -1,8 +1,7 @@
-import sys
-import nbformat
-from nbformat.v4 import new_code_cell, new_notebook
-
 import codecs
+import nbformat
+import sys
+from nbformat.v4 import new_code_cell, new_notebook
 
 name = sys.argv[-1][:-3]
 source = name + ".py"
@@ -13,8 +12,8 @@ def parse_python(file):
     with open(file, "r") as file_descriptor:
         lines = []
         for line in file_descriptor:
-            line = line.strip()
-            if line.startswith('# In[') and line.endswith(']:') and lines:
+            line_stripped = line.strip()
+            if line_stripped.startswith('# In[') and line_stripped.endswith(']:') and lines:
                 yield "".join(lines)
                 lines = []
                 continue
@@ -22,6 +21,7 @@ def parse_python(file):
         if lines:
             yield "".join(lines)
 
+
 cells = []
 for cell_content in parse_python(source):
     cells.append(new_code_cell(source=cell_content))