[Docs] Update check commands in Japanese documents (#7787)

The Japanese documents included a sample command to check the original document changes. But there was something wrong, so I fixed it.

1 files changed, 1 insertions, 1 deletions

diff --git a/docs/ja/faq_debug.md b/docs/ja/faq_debug.md
index a9c7e3df06..8e42aebbb5 100644
--- a/docs/ja/faq_debug.md
+++ b/docs/ja/faq_debug.md
@@ -2,7 +2,7 @@
 
 <!---
   original document: 376419a4f:docs/faq_debug.md
-  git diff 376419a4f HEAD docs/faq_debug.md | cat
+  git diff 376419a4f HEAD -- docs/faq_debug.md | cat
 -->
 
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