Fixed Layout/HeredocIndentation: Use 2 spaces for indentation in a heredoc by using <<~ instead of <<- (#32424).

git-svn-id: http://svn.redmine.org/redmine/trunk@21163 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/lib/redmine/wiki_formatting/common_mark/formatter_test.rb

@@ -134,13 +134,13 @@ class Redmine::WikiFormatting::CommonMark::FormatterTest < ActionView::TestCase
     end
 
     def test_footnotes
-      text = <<-STR
+      text = <<~STR
         This is some text[^1].
 
         [^1]: This is the foot note
       STR
 
-      expected = <<-EXPECTED
+      expected = <<~EXPECTED
         <p>This is some text<sup><a href="#fn1" id="fnref1">1</a></sup>.</p>
          <ol>
         <li id="fn1">