Fix: ST2 compatibility issue (#515)

Fixes #515

The python26 of ST2 is too stupid to know about how to define a `set`.

Author: deathaxe

modules/annotation.py

@@ -17,7 +17,7 @@ class SimpleLineAnnotationTemplate(object):
     TEMPLATE = '⟢ {line_author} ({line_author_age}) · {line_summary}'
 
     # a list of variables used by this template
-    variables = {'line_author', 'line_author_age', 'line_summary'}
+    variables = frozenset(['line_author', 'line_author_age', 'line_summary'])
 
     @classmethod
     def render(cls, **kwargs):

modules/blame.py

@@ -5,7 +5,7 @@
 from .utils import line_from_kwargs
 
 # A set of all supported variables
-BLAME_VARIABLES = {
+BLAME_VARIABLES = frozenset([
     'line_commit',
     'line_previous',
     'line_summary',
@@ -19,7 +19,7 @@
     'line_committer_age',
     'line_committer_time',
     'line_committer_tz'
-}
+])
 
 
 def run_blame(git_gutter, **kwargs):

modules/statusbar.py

@@ -7,10 +7,10 @@ class SimpleStatusBarTemplate(object):
     """A simple template class with the same interface as jinja2's one."""
 
     # a list of variables used by this template
-    variables = {
+    variables = frozenset([
         'repo', 'branch', 'compare', 'inserted', 'deleted', 'modified',
         'line_author', 'line_author_age'
-    }
+    ])
 
     @staticmethod
     def render(repo=None, branch=None, compare=None, inserted=0, deleted=0,