Fix typo on exception
@@ -76,7 +76,7 @@ class MkDocsYAMLParseError(BuildUserError):
INVALID_EXTRA_CONFIG = gettext_noop(
'The "{config}" config from your MkDocs YAML config file has to be a '
- 'a list of relative paths.',
+ 'list of relative paths.',
)
EMPTY_CONFIG = gettext_noop(
