[Docs] Fix the example error in registry.md (#2243)

the lack of colon(:)

[Docs] Fix the example error in registry.md (#2243)
the lack of colon(:)
7f09a983 · Hoantrbl · GitHub · e843d73f · 7f09a983
Unverified Commit 7f09a983 authored Sep 02, 2022 by Hoantrbl Committed by GitHub Sep 02, 2022
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docs/zh_cn/understand_mmcv/registry.md docs/zh_cn/understand_mmcv/registry.md +1 -1

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--- a/docs/zh_cn/understand_mmcv/registry.md
+++ b/docs/zh_cn/understand_mmcv/registry.md
@@ -56,7 +56,7 @@ from .converter1 import Converter1
 # 使用注册器管理模块
 @CONVERTERS.register_module()
-def converter2(a, b)
+def converter2(a, b):
    return Converter1(a, b)
 ```