From 159a63c85eb77ec321301bc4c4ebfb90343edc2b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jakub=20Ko=C5=82odziejczak?=
 <31549762+mrl5@users.noreply.github.com>
Date: Tue, 26 Jul 2022 13:19:38 +0200
Subject: [PATCH] doc: add a note about the empty regex

This improvement is a consequence of the Q&A discussion from
https://github.com/rust-lang/regex/discussions/896

PR #897
---
 src/lib.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 3e3b0a007..6b95739c5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -353,6 +353,9 @@ $     the end of text (or end-of-line with multi-line mode)
 \B    not a Unicode word boundary
 </pre>
 
+The empty regex is valid and matches the empty string. For example, the empty
+regex matches `abc` at positions `0`, `1`, `2` and `3`.
+
 ## Grouping and flags
 
 <pre class="rust">