diff --git a/parso/python/normalizer.py b/parso/python/normalizer.py
index b6876a8..b845a37 100644
--- a/parso/python/normalizer.py
+++ b/parso/python/normalizer.py
@@ -70,10 +70,26 @@ class IndentationNode(object):
 
 
 class BracketNode(IndentationNode):
-    def __init__(self, config, parent_indentation, leaf, parent,
-                 in_suite_introducer=False):
+    def __init__(self, config, leaf, parent, in_suite_introducer=False):
         self.leaf = leaf
 
+        # Figure out here what the indentation is. For chained brackets
+        # we can basically use the previous indentation.
+        previous_leaf = leaf
+        n = parent
+        if n.type == IndentationTypes.IMPLICIT:
+            n = n.parent
+        while True:
+            if hasattr(n, 'leaf') and previous_leaf.line != n.leaf.line:
+                break
+
+            previous_leaf = previous_leaf.get_previous_leaf()
+            if not isinstance(n, BracketNode) or previous_leaf != n.leaf:
+                break
+            n = n.parent
+        parent_indentation = n.indentation
+
+
         next_leaf = leaf.get_next_leaf()
         if '\n' in next_leaf.prefix:
             # This implies code like:
@@ -113,7 +129,8 @@ class ImplicitNode(BracketNode):
     annotations and dict values.
     """
     def __init__(self, config, parent_indentation, leaf, parent):
-        super(ImplicitNode, self).__init__(config, parent_indentation, leaf, parent)
+        # TODO remove parent_indentation?
+        super(ImplicitNode, self).__init__(config, leaf, parent)
         self.type = IndentationTypes.IMPLICIT
 
         next_leaf = leaf.get_next_leaf()
@@ -477,21 +494,8 @@ class PEP8Normalizer(Normalizer):
         if value and value in '()[]{}' and type_ != 'error_leaf' \
                 and leaf.parent.type != 'error_node':
             if value in _OPENING_BRACKETS:
-                # Figure out here what the indentation is. For chained brackets
-                # we can basically use the previous indentation.
-                previous_leaf = leaf
-                n = self._indentation_tos
-                while True:
-                    if hasattr(n, 'leaf') and previous_leaf.line != n.leaf.line:
-                        break
-
-                    previous_leaf = previous_leaf.get_previous_leaf()
-                    if not isinstance(n, BracketNode) or previous_leaf != n.leaf:
-                        break
-                    n = n.parent
-
                 self._indentation_tos = BracketNode(
-                    self._config, n.indentation, leaf,
+                    self._config, leaf,
                     parent=self._indentation_tos,
                     in_suite_introducer=self._in_suite_introducer
                 )
@@ -508,6 +512,7 @@ class PEP8Normalizer(Normalizer):
 
         self._on_newline = type_ in ('newline', 'backslash')
 
+        self._pre_previous_leaf = self._previous_leaf
         self._previous_leaf = leaf
         self._previous_spacing = spacing
         return value
@@ -607,7 +612,8 @@ class PEP8Normalizer(Normalizer):
                 add_not_spaces(275, 'Missing whitespace around keyword', spacing)
             else:
                 prev_spacing = self._previous_spacing
-                if prev in _ALLOW_SPACE and spaces != prev_spacing.value:
+                if prev in _ALLOW_SPACE and spaces != prev_spacing.value \
+                        and '\n' not in self._actual_previous_leaf.prefix:
                     message = "Whitespace before operator doesn't match with whitespace after"
                     self.add_issue(229, message, spacing)
 
diff --git a/test/normalizer_issue_files/E12_first.py b/test/normalizer_issue_files/E12_first.py
index f36382f..49588d7 100644
--- a/test/normalizer_issue_files/E12_first.py
+++ b/test/normalizer_issue_files/E12_first.py
@@ -56,7 +56,7 @@ result = {
 rv.update(dict.fromkeys((
               'qualif_nr', 'reasonComment_en', 'reasonComment_fr',
               'reasonComment_de', 'reasonComment_it'),
-          #: E128
+                        #: E128:10
           '?'),
           "foo")
 
@@ -74,5 +74,5 @@ part = set_mimetype((
                     'default')
 part = set_mimetype((
     a.get('mime_type', 'text')),
-    #: E127:21
+                    #: E127:21
                      'default')
diff --git a/test/normalizer_issue_files/E12_not_second.py b/test/normalizer_issue_files/E12_not_second.py
index 5c616c7..8949ec6 100644
--- a/test/normalizer_issue_files/E12_not_second.py
+++ b/test/normalizer_issue_files/E12_not_second.py
@@ -267,16 +267,9 @@ if True:
 
 def valid_example():
     return [node.copy(properties=dict(
-                (key, val if val is not None else token.undefined)
-                for key, val in node.items()
-            ))]
-
-
-def other_example():
-    return [node.copy(properties=dict(
-        (key, val if val is not None else token.undefined)
-        for key, val in node.items()
-    ))]
+                          (key, val if val is not None else token.undefined)
+                          for key, val in node.items()
+                      ))]
 
 
 foo([
diff --git a/test/normalizer_issue_files/E12_third.py b/test/normalizer_issue_files/E12_third.py
index 0957737..8eb0ac1 100644
--- a/test/normalizer_issue_files/E12_third.py
+++ b/test/normalizer_issue_files/E12_third.py
@@ -77,14 +77,12 @@ if True:
     def example_issue254():
         #: 
         return [node.copy(
-                    #: E121:12
-            (
-                    #: E121:16 E126+1:24 E126+2:24
+                    (
+                        #: E121:16 E121+3:20
                 replacement
                         # First, look at all the node's current children.
                         for child in node.children
                     for replacement in replace(child)
-                    #: E123
                     ),
                     dict(name=token.undefined)
                 )]