[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

docs/html/topics/configuration.md

@@ -35,7 +35,7 @@ Additionally, environment variables can be specified which will override any of
 pip's configuration files are located in fairly standard locations. This
 location is different on different operating systems, and has some additional
 complexity for backwards compatibility reasons. Note that if user config files
-exist in both the legacy and current locations, values in the current file 
+exist in both the legacy and current locations, values in the current file
 will override values in the legacy file.
 
 ```{tab} Unix

news/11815.doc.rst

@@ -1 +1 @@
-Fix explanation of how PIP_CONFIG_FILE works
+Fix explanation of how PIP_CONFIG_FILE works

src/pip/_internal/configuration.py

@@ -327,7 +327,7 @@ def get_environ_vars(self) -> Iterable[Tuple[str, str]]:
     def iter_config_files(self) -> Iterable[Tuple[Kind, List[str]]]:
         """Yields variant and configuration files associated with it.
 
-        This should be treated like items of a dictionary. The order 
+        This should be treated like items of a dictionary. The order
         here doesn't affect what gets overridden. That is controlled
         by OVERRIDE_ORDER. However this does control the order they are
         displayed to the user. It's probably most ergononmic to display
@@ -356,7 +356,6 @@ def iter_config_files(self) -> Iterable[Tuple[Kind, List[str]]]:
         else:
             yield kinds.ENV, []
 
-
     def get_values_in_config(self, variant: Kind) -> Dict[str, Any]:
         """Get values present in a config file"""
         return self._config[variant]