diff --git a/lark/exceptions.py b/lark/exceptions.py
index da982e33..dafe0b37 100644
--- a/lark/exceptions.py
+++ b/lark/exceptions.py
@@ -72,7 +72,7 @@ def get_context(self, text: str, span: int=40) -> str:
             after = text[pos:end].split(b'\n', 1)[0]
             return (before + after + b'\n' + b' ' * len(before.expandtabs()) + b'^\n').decode("ascii", "backslashreplace")
 
-    def match_examples(self, parse_fn: 'Callable[[str], Tree]', 
+    def match_examples(self, parse_fn: 'Callable[[str], Tree]',
                              examples: Union[Mapping[T, Iterable[str]], Iterable[Tuple[T, Iterable[str]]]],
                              token_type_match_fallback: bool=False,
                              use_accepts: bool=True
@@ -229,7 +229,7 @@ class UnexpectedToken(ParseError, UnexpectedInput):
 
     def __init__(self, token, expected, considered_rules=None, state=None, interactive_parser=None, terminals_by_name=None, token_history=None):
         super(UnexpectedToken, self).__init__()
-        
+
         # TODO considered_rules and expected can be figured out using state
         self.line = getattr(token, 'line', '?')
         self.column = getattr(token, 'column', '?')
diff --git a/lark/lark.py b/lark/lark.py
index 8da98409..9f80ef06 100644
--- a/lark/lark.py
+++ b/lark/lark.py
@@ -310,7 +310,7 @@ def __init__(self, grammar: 'Union[Grammar, str, IO[str]]', **options) -> None:
                 else:
                     if self.options.cache is not True:
                         raise ConfigurationError("cache argument must be bool or str")
-                        
+
                     try:
                         username = getpass.getuser()
                     except Exception:
@@ -339,7 +339,7 @@ def __init__(self, grammar: 'Union[Grammar, str, IO[str]]', **options) -> None:
                     pass
                 except Exception: # We should probably narrow done which errors we catch here.
                     logger.exception("Failed to load Lark from cache: %r. We will try to carry on.", cache_fn)
-                    
+
                     # In theory, the Lark instance might have been messed up by the call to `_load`.
                     # In practice the only relevant thing that might have been overwritten should be `options`
                     self.options = old_options
@@ -609,7 +609,7 @@ def lex(self, text: str, dont_ignore: bool=False) -> Iterator[Token]:
     def get_terminal(self, name: str) -> TerminalDef:
         """Get information about a terminal"""
         return self._terminals_dict[name]
-    
+
     def parse_interactive(self, text: Optional[str]=None, start: Optional[str]=None) -> 'InteractiveParser':
         """Start an interactive parsing session.
 
diff --git a/lark/parser_frontends.py b/lark/parser_frontends.py
index e162edfa..4e28e361 100644
--- a/lark/parser_frontends.py
+++ b/lark/parser_frontends.py
@@ -74,7 +74,7 @@ def __init__(self, lexer_conf, parser_conf, options, parser=None):
 
         if lexer_conf.postlex:
             self.lexer = PostLexConnector(self.lexer, lexer_conf.postlex)
-    
+
     def _verify_start(self, start=None):
         if start is None:
             start_decls = self.parser_conf.start
@@ -94,7 +94,7 @@ def parse(self, text, start=None, on_error=None):
         kw = {} if on_error is None else {'on_error': on_error}
         stream = self._make_lexer_thread(text)
         return self.parser.parse(stream, chosen_start, **kw)
-    
+
     def parse_interactive(self, text=None, start=None):
         chosen_start = self._verify_start(start)
         if self.parser_conf.parser_type != 'lalr':