fix typo

diff --git a/rust/doc/src/system-file/index.md b/rust/doc/src/system-file/index.md
index bf4cf38436bd2a193e43d7defdd64085cc3975f8..068711db0d52847c8d735eaba68b2457380e33e6 100644 (file)
--- a/rust/doc/src/system-file/index.md
+++ b/rust/doc/src/system-file/index.md
@@ -67,4 +67,4 @@ record](character-encoding-record.md), if present, and failing that
 the [character_code](machine-integer-info-record.md#character_code) in
 the machine integer info record.  The same encoding should be used
 for the dictionary and the data in the file, although it is possible
-to artificially synthesize files that use different encodings..
+to artificially synthesize files that use different encodings.