new splitlines implementation to get rid of the ugly splitlines we now have as well as (partially) the issue with form feeds

jedi/api/__init__.py

@@ -86,9 +86,7 @@ class Script(object):
             with open(path) as f:
                 source = f.read()
 
-        lines = source.splitlines() or ['']
-        if source and source[-1] == '\n':
-            lines.append('')
+        lines = common.splitlines(source)
         line = max(len(lines), 1) if line is None else line
         if not (0 < line <= len(lines)):
             raise ValueError('`line` parameter is not in a valid range.')

jedi/common.py

@@ -146,3 +146,13 @@ def source_to_unicode(source, encoding=None):
 
     # cast to unicode by default
     return unicode(source, detect_encoding(), 'replace')
+
+
+def splitlines(string):
+    """
+    A splitlines for Python code. In contrast to Python's ``str.splitlines``,
+    looks at form feeds and other special characters as normal text. Just
+    splits ``\n`` and ``\r\n``.
+    Also different: Returns ``['']`` for an empty string input.
+    """
+    return re.split('\n|\r\n', string)