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

for more information, see https://pre-commit.ci

manim/utils/commands.py

@@ -15,7 +15,7 @@
 
 def capture(command, cwd=None, command_input=None):
     p = run(command, cwd=cwd, input=command_input, capture_output=True)
-    out, err = p.stdout.decode('utf-8'), p.stderr.decode('utf-8')
+    out, err = p.stdout.decode("utf-8"), p.stderr.decode("utf-8")
     return out, err, p.returncode