From 3f627c0d7ddc91162e0d1e49f64de2dea977cdf5 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Sat, 21 Mar 2026 14:19:55 +0900
Subject: [PATCH] mruby-regexp: update README for x flag support

Co-authored-by: Claude <noreply@anthropic.com>
---
 mrbgems/mruby-regexp/README.md | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mrbgems/mruby-regexp/README.md b/mrbgems/mruby-regexp/README.md
index a59212cf6..363206d10 100644
--- a/mrbgems/mruby-regexp/README.md
+++ b/mrbgems/mruby-regexp/README.md
@@ -36,6 +36,7 @@ simulation) with backtracking fallback.
 
 - `i` (`Regexp::IGNORECASE`) case-insensitive matching (ASCII)
 - `m` (`Regexp::MULTILINE`) `.` matches newline; `^`/`$` match at line boundaries
+- `x` (`Regexp::EXTENDED`) free-spacing mode; unescaped whitespace ignored, `#` starts comments
 
 ### Ruby API
 
@@ -104,8 +105,6 @@ pattern analysis.
 - **No lookbehind**: `(?<=...)` and `(?<!...)` are not supported.
 - **No Unicode properties**: `\p{Alpha}`, `\p{L}`, etc. are not
   supported.
-- **No extended mode**: The `x` flag (free-spacing mode) is not
-  supported.
 - **ASCII case folding only**: The `i` flag handles ASCII letters
   only.
 - **Step limit on backtracking**: Patterns that require the