From 1c58230ad69bfc7b96390da4843cfb55f69fbe35 Mon Sep 17 00:00:00 2001
From: Ashwin Maroli <ashmaroli@gmail.com>
Date: Tue, 18 Sep 2018 19:08:51 +0530
Subject: [PATCH] print warning only if excerpt has been modified

---
 lib/jekyll/excerpt.rb | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/jekyll/excerpt.rb b/lib/jekyll/excerpt.rb
index 76c0c2d927b..c3ad47c5cd6 100644
--- a/lib/jekyll/excerpt.rb
+++ b/lib/jekyll/excerpt.rb
@@ -142,14 +142,15 @@ def extract_excerpt(doc_content)
       if head.include?("{%")
         tag_names = head.scan(LIQUID_TAG_REGEX)
         tag_names.flatten!
-        print_build_warning unless tag_names.empty?
-
+        modified = false
         tag_names.reverse_each do |tag_name|
           next unless liquid_block?(tag_name)
           next if head =~ endtag_regex_stash(tag_name)
 
+          modified = true
           head << "\n{% end#{tag_name} %}"
         end
+        print_build_warning if modified
       end
 
       return head if tail.empty?