Fix docstring for load_dotenv

The docstring for load_dotenv was missing a word, rendering it confusing.
This commits modifies it for clarity.

src/dotenv/main.py

@@ -6,8 +6,7 @@
 import tempfile
 from collections import OrderedDict
 from contextlib import contextmanager
-from typing import (IO, Dict, Iterable, Iterator, Mapping, Optional, Tuple,
-                    Union)
+from typing import IO, Dict, Iterable, Iterator, Mapping, Optional, Tuple, Union
 
 from .parser import Binding, parse_stream
 from .variables import parse_variables
@@ -30,7 +29,7 @@ def with_warn_for_invalid_lines(mappings: Iterator[Binding]) -> Iterator[Binding
         yield mapping
 
 
-class DotEnv():
+class DotEnv:
     def __init__(
         self,
         dotenv_path: Optional[Union[str, _PathLike]],
@@ -59,9 +58,9 @@ def _get_stream(self) -> Iterator[IO[str]]:
             if self.verbose:
                 logger.info(
                     "Python-dotenv could not find configuration file %s.",
-                    self.dotenv_path or '.env',
+                    self.dotenv_path or ".env",
                 )
-            yield io.StringIO('')
+            yield io.StringIO("")
 
     def dict(self) -> Dict[str, Optional[str]]:
         """Return dotenv as dict"""
@@ -71,7 +70,9 @@ def dict(self) -> Dict[str, Optional[str]]:
         raw_values = self.parse()
 
         if self.interpolate:
-            self._dict = OrderedDict(resolve_variables(raw_values, override=self.override))
+            self._dict = OrderedDict(
+                resolve_variables(raw_values, override=self.override)
+            )
         else:
             self._dict = OrderedDict(raw_values)
 
@@ -96,8 +97,7 @@ def set_as_environment_variables(self) -> bool:
         return True
 
     def get(self, key: str) -> Optional[str]:
-        """
-        """
+        """ """
         data = self.dict()
 
         if key in data:
@@ -131,7 +131,9 @@ def rewrite(
         if not os.path.isfile(path):
             with io.open(path, "w+", encoding=encoding) as source:
                 source.write("")
-        with tempfile.NamedTemporaryFile(mode="w+", delete=False, encoding=encoding) as dest:
+        with tempfile.NamedTemporaryFile(
+            mode="w+", delete=False, encoding=encoding
+        ) as dest:
             with io.open(path, encoding=encoding) as source:
                 yield (source, dest)  # type: ignore
     except BaseException:
@@ -159,17 +161,16 @@ def set_key(
     if quote_mode not in ("always", "auto", "never"):
         raise ValueError("Unknown quote_mode: {}".format(quote_mode))
 
-    quote = (
-        quote_mode == "always"
-        or (quote_mode == "auto" and not value_to_set.isalnum())
+    quote = quote_mode == "always" or (
+        quote_mode == "auto" and not value_to_set.isalnum()
     )
 
     if quote:
         value_out = "'{}'".format(value_to_set.replace("'", "\\'"))
     else:
         value_out = value_to_set
     if export:
-        line_out = 'export {}={}\n'.format(key_to_set, value_out)
+        line_out = "export {}={}\n".format(key_to_set, value_out)
     else:
         line_out = "{}={}\n".format(key_to_set, value_out)
 
@@ -216,7 +217,9 @@ def unset_key(
                 dest.write(mapping.original.string)
 
     if not removed:
-        logger.warning("Key %s not removed from %s - key doesn't exist.", key_to_unset, dotenv_path)
+        logger.warning(
+            "Key %s not removed from %s - key doesn't exist.", key_to_unset, dotenv_path
+        )
         return None, key_to_unset
 
     return removed, key_to_unset
@@ -252,7 +255,7 @@ def _walk_to_root(path: str) -> Iterator[str]:
     Yield directories starting from the given directory up to the root
     """
     if not os.path.exists(path):
-        raise IOError('Starting path not found')
+        raise IOError("Starting path not found")
 
     if os.path.isfile(path):
         path = os.path.dirname(path)
@@ -266,7 +269,7 @@ def _walk_to_root(path: str) -> Iterator[str]:
 
 
 def find_dotenv(
-    filename: str = '.env',
+    filename: str = ".env",
     raise_error_if_not_found: bool = False,
     usecwd: bool = False,
 ) -> str:
@@ -277,11 +280,11 @@ def find_dotenv(
     """
 
     def _is_interactive():
-        """ Decide whether this is running in a REPL or IPython notebook """
-        main = __import__('__main__', None, None, fromlist=['__file__'])
-        return not hasattr(main, '__file__')
+        """Decide whether this is running in a REPL or IPython notebook"""
+        main = __import__("__main__", None, None, fromlist=["__file__"])
+        return not hasattr(main, "__file__")
 
-    if usecwd or _is_interactive() or getattr(sys, 'frozen', False):
+    if usecwd or _is_interactive() or getattr(sys, "frozen", False):
         # Should work without __file__, e.g. in REPL or IPython notebook.
         path = os.getcwd()
     else:
@@ -301,9 +304,9 @@ def _is_interactive():
             return check_path
 
     if raise_error_if_not_found:
-        raise IOError('File not found')
+        raise IOError("File not found")
 
-    return ''
+    return ""
 
 
 def load_dotenv(
@@ -325,7 +328,8 @@ def load_dotenv(
       in `.env` file.  Defaults to `False`.
     - *encoding*: encoding to be used to read the file.
 
-    If both `dotenv_path` and `stream`, `find_dotenv()` is used to find the .env file.
+    If neither `dotenv_path` nor `stream` are provided, `find_dotenv()` is used
+    to find the .env file.
     """
     if dotenv_path is None and stream is None:
         dotenv_path = find_dotenv()