Preserve spaces before comments at the beginning of a file

certbot-compatibility-test/nginx/nginx-roundtrip-testdata/chive/chive-nginx-master/win-utf

@@ -2,7 +2,6 @@
 # This map is not a full windows-1251 <> utf8 map: it does not
 # contain Serbian and Macedonian letters.  If you need a full map,
 # use contrib/unicode2nginx/win-utf map instead.
-#
 
 charset_map  windows-1251  utf-8 {
 

certbot-nginx/certbot_nginx/nginxparser.py

@@ -73,16 +73,11 @@ class RawNginxParser(object):
     block << Group(block_begin + left_bracket + block_innards + right_bracket)
 
     script = OneOrMore(Group(comment | assignment) ^ block ^ map_block) + space + stringEnd
-    script.parseWithTabs()
-    testLine = OneOrMore(Group(space + key + location_statement)).leaveWhitespace()
-    testTwo = OneOrMore(block)
+    script.parseWithTabs().leaveWhitespace()
 
     def __init__(self, source):
         self.source = source
 
-    def test(self):
-        return self.testLine.parseString(self.source)
-
     def parse(self):
         """Returns the parsed tree."""
         return self.script.parseString(self.source)