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

pre-commit-ci[bot] · pre-commit-ci[bot] · commit d3410b0c4f9a · 2021-10-27T04:23:33.000Z
for more information, see https://pre-commit.ci
diff --git a/doc/en/conf.py b/doc/en/conf.py
@@ -43,7 +43,8 @@
 latex_engine = "lualatex"
 
 latex_elements = {
-    'preamble': dedent("""
+    "preamble": dedent(
+        r"""
         \directlua{
             luaotfload.add_fallback("fallbacks", {
                 "Noto Serif CJK SC:style=Regular;",
@@ -52,7 +53,8 @@
         }
 
         \setmainfont{FreeSerif}[RawFeature={fallback=fallbacks}]
-    """)
+    """
+    )
 }
 
 # -- General configuration -----------------------------------------------------
