diff --git a/lib/pseudohiki/markdownformat.rb b/lib/pseudohiki/markdownformat.rb
index <HASH>..<HASH> 100644
--- a/lib/pseudohiki/markdownformat.rb
+++ b/lib/pseudohiki/markdownformat.rb
@@ -343,7 +343,7 @@ module PseudoHiki
       end
 
       def warning_for_non_comformant_style
-        warning_message =<<ERROR
+        warning_message = <<ERROR
 The table is not conformant to GFM style.
 The first row will be treated as a header row.
 ERROR
added a space after an = for the consistency of coding style