Allow non-breaking spaces in nginx config files (#10126)

Fixes @josevavia's issue in #9942.

certbot-nginx/certbot_nginx/_internal/nginxparser.py

@@ -35,8 +35,8 @@ class RawNginxParser:
     """A class that parses nginx configuration with pyparsing."""
 
     # constants
-    space = Optional(White()).leaveWhitespace()
-    required_space = White().leaveWhitespace()
+    space = Optional(White(ws=' \t\r\n\u00a0')).leaveWhitespace()
+    required_space = White(ws=' \t\r\n\u00a0').leaveWhitespace()
 
     left_bracket = Literal("{").suppress()
     right_bracket = space + Literal("}").suppress()

certbot-nginx/certbot_nginx/_internal/tests/nginxparser_test.py

@@ -362,6 +362,18 @@ class TestRawNginxParser(unittest.TestCase):
         parsed = loads("")
         assert parsed == []
 
+    def test_non_breaking_spaces(self):
+        # non-breaking spaces
+        test = u'\u00a0'
+        loads(test)
+        test = """
+        map $http_upgrade $connection_upgrade {
+            default upgrade;
+            ''      close;
+        }
+        """
+        loads(test)
+
 
 class TestUnspacedList(unittest.TestCase):
     """Test the UnspacedList data structure"""

certbot-nginx/setup.py

@@ -11,7 +11,7 @@ install_requires = [
     f'certbot>={version}',
     # pyOpenSSL 23.1.0 is a bad release: https://github.com/pyca/pyopenssl/issues/1199
     'PyOpenSSL>=17.5.0,!=23.1.0',
-    'pyparsing>=2.2.1',
+    'pyparsing>=2.4.7',
 ]
 
 test_extras = [