Move common to evaluate.utils.

jedi/evaluate/docstrings.py

@@ -21,10 +21,9 @@ from textwrap import dedent
 from parso import parse
 
 from jedi._compatibility import u
-from jedi.common import unite
+from jedi.evaluate.utils import unite, indent_block
 from jedi.evaluate import context
 from jedi.evaluate.cache import evaluator_method_cache
-from jedi.common import indent_block
 from jedi.evaluate.iterable import SequenceLiteralContext, FakeSequence