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-rw-r--r--src/doc/rustc-dev-guide/.gitignore3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/doc/rustc-dev-guide/.gitignore b/src/doc/rustc-dev-guide/.gitignore
index 7585238efed..b8cb34883f5 100644
--- a/src/doc/rustc-dev-guide/.gitignore
+++ b/src/doc/rustc-dev-guide/.gitignore
@@ -1 +1,4 @@
 book
+
+# prevent accidentally changes
+book.toml