docs(lib): improve section for empty matches

this improvement is a consequence of the Q&A discussion from #896
rust-lang · Jul 24, 2022 · 7a771ba · 7a771ba
1 parent fc6f5cc
commit 7a771ba
Showing 1 changed file with 3 additions and 0 deletions.
diff --git 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">