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Index: cloud-init-0.7.6-bzr1245/cloudinit/distros/__init__.py
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===================================================================
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--- cloud-init-0.7.6-bzr1245.orig/cloudinit/distros/__init__.py
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+++ cloud-init-0.7.6-bzr1245/cloudinit/distros/__init__.py
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@@ -376,7 +376,7 @@ class Distro(object):
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                 # that can go right through to the command.
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                 kwargs['groups'] = ",".join(groups)
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             else:
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-                groups = groups.split(",")
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+                groups = [group.strip() for group in groups.split(",")]
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             primary_group = kwargs.get('primary_group')
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             if primary_group:
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@@ -673,7 +673,7 @@ def _get_arch_package_mirror_info(packag
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 # of cloud-init
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 def _normalize_groups(grp_cfg):
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     if isinstance(grp_cfg, six.string_types):
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-        grp_cfg = grp_cfg.strip().split(",")
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+        grp_cfg = [grp.strip() for grp in grp_cfg.strip().split(",")]
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     if isinstance(grp_cfg, list):
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         c_grp_cfg = {}
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         for i in grp_cfg:
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@@ -691,11 +691,14 @@ def _normalize_groups(grp_cfg):
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                         if isinstance(v, list):
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                             c_grp_cfg[k].extend(v)
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                         elif isinstance(v, six.string_types):
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-                            c_grp_cfg[k].append(v)
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+                            c_grp_cfg[k].append(v.strip())
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                         else:
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                             raise TypeError("Bad group member type %s" %
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                                             type_utils.obj_name(v))
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             elif isinstance(i, six.string_types):
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+                # Common to have leading whitespace in string lists,
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+                # but not all useradd tools will support it.
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+                i = i.strip()
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                 if i not in c_grp_cfg:
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                     c_grp_cfg[i] = []
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             else: