Upgrade rust/crates/regex-syntax to 0.6.20
Test: make
Change-Id: If42f1186cfdfae7f6752ca48aa7501c7626459a6
diff --git a/src/lib.rs b/src/lib.rs
index 7892668..f35c913 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -198,7 +198,7 @@
///
/// These are the only characters that are allowed to be escaped, with one
/// exception: an ASCII space character may be escaped when extended mode (with
-/// the `x` flag) is enabld. In particular, `is_meta_character(' ')` returns
+/// the `x` flag) is enabled. In particular, `is_meta_character(' ')` returns
/// `false`.
///
/// Note that the set of characters for which this function returns `true` or