[Fix #1078] Fix a crasher in HtmlToStringHelper

app/helpers/html_to_string_helper.rb

@@ -1,5 +1,8 @@
 module HtmlToStringHelper
   def html_to_string(html)
+    if html.blank?
+      html
+    else
       string_with_tags = html
         .gsub(/<br[ ]?[\/]?>/, "\n")
         .gsub('</p>', "\n")
@@ -7,4 +10,5 @@ module HtmlToStringHelper
 
       strip_tags(string_with_tags)
     end
+  end
 end

spec/helpers/html_to_string_helper_spec.rb

@@ -4,6 +4,11 @@ describe HtmlToStringHelper do
       it { expect(helper.html_to_string('text')).to eq('text') }
     end
 
+    describe 'deals with empty / nil strings' do
+      it { expect(helper.html_to_string(nil)).to eq(nil) }
+      it { expect(helper.html_to_string('')).to eq("") }
+    end
+
     describe 'deals with <br>' do
       it { expect(helper.html_to_string('new<br>line')).to eq("new\nline") }
       it { expect(helper.html_to_string('new<br/>line')).to eq("new\nline") }