https://git.ruby-lang.org/ruby.git/commit/?id=dea08758be

From dea08758be2ee02b5e2d85ee49aca85a9ea85201 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Thu, 4 Mar 2021 11:39:45 +0900
Subject: Check for trailing spaces

---
 .github/workflows/check_misc.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.github/workflows/check_misc.yml b/.github/workflows/check_misc.yml
index 2f4bbc7..c116011 100644
--- a/.github/workflows/check_misc.yml
+++ b/.github/workflows/check_misc.yml
@@ -9,6 +9,9 @@ jobs: https://github.com/ruby/ruby/blob/trunk/.github/workflows/check_misc.yml#L9
       - name: Check if C-sources are US-ASCII
         run: |
           ! grep -r -n '[^	 -~]' *.[chy] include internal win32/*.[ch]
+      - name: Check for trailing spaces
+        run: |
+          ! git grep -n '[	 ]$' '*.rb' '*.[chy]'
       - name: Check for header macros
         run: |
           ! for header in ruby/*.h; do \
-- 
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