Tidy up text emails

app/models/discussion.rb

@@ -165,18 +165,21 @@ class Discussion
   # Returns an array of at most 16 highlighted lines above a diff note
   def truncated_diff_lines(highlight: true)
-    initial_lines = highlight ? highlighted_diff_lines : diff_lines
+    lines = highlight ? highlighted_diff_lines : diff_lines
     prev_lines = []
-    initial_lines.each do |line|
+    lines.each do |line|
       if line.meta?
         prev_lines.clear
       else
         prev_lines << line
+
         break if for_line?(line)
+
         prev_lines.shift if prev_lines.length >= NUMBER_OF_TRUNCATED_DIFF_LINES
       end
     end
+
     prev_lines
   end

app/views/notify/_note_mr_or_commit_email.text.erb

-<% if @note.diff_note? && @note.diff_file -%>
+<% if @discussion && @discussion.diff_file -%>
  on <%= @note.diff_file.file_path -%>
 <% end -%>:

app/views/notify/_simple_diff.text.erb

 <% @discussion.truncated_diff_lines(highlight: false).each do |line| %>
-  <%= "> " + line.text %>
+> <%= line.text %>
 <% end %>

app/views/notify/note_commit_email.text.erb

-<% url = url_for(namespace_project_commit_url(@note.project.namespace, @note.project, id: @commit.id, anchor: "note_#{@note.id}")) %>
-
 New comment for Commit <%= @commit.short_id -%>
-<%= render partial: 'note_mr_or_commit_email', locals: { url: url } %>
+<%= render partial: 'note_mr_or_commit_email', locals: { url: @target_url } %>

app/views/notify/note_merge_request_email.text.erb

-<% url = url_for(namespace_project_merge_request_url(@merge_request.target_project.namespace, @merge_request.target_project, @merge_request, anchor: "note_#{@note.id}")) %>
-
 New comment for Merge Request <%= @merge_request.to_reference -%>
-<%= render partial: 'note_mr_or_commit_email', locals: { url: url }%>
+<%= render partial: 'note_mr_or_commit_email', locals: { url: @target_url }%>

spec/mailers/notify_spec.rb

@@ -50,7 +50,7 @@ describe Notify do
           context 'when enabled email_author_in_body' do
             before do
-              allow_any_instance_of(ApplicationSetting).to receive(:email_author_in_body).and_return(true)
+              stub_application_setting(email_author_in_body: true)
             end
             it 'contains a link to note author' do
@@ -229,7 +229,7 @@ describe Notify do
           context 'when enabled email_author_in_body' do
             before do
-              allow_any_instance_of(ApplicationSetting).to receive(:email_author_in_body).and_return(true)
+              stub_application_setting(email_author_in_body: true)
             end
             it 'contains a link to note author' do
@@ -607,7 +607,7 @@ describe Notify do
         context 'when enabled email_author_in_body' do
           before do
-            allow_any_instance_of(ApplicationSetting).to receive(:email_author_in_body).and_return(true)
+            stub_application_setting(email_author_in_body: true)
           end
           it 'contains a link to note author' do
@@ -726,7 +726,7 @@ describe Notify do
         context 'when enabled email_author_in_body' do
           before do
-            allow_any_instance_of(ApplicationSetting).to receive(:email_author_in_body).and_return(true)
+            stub_application_setting(email_author_in_body: true)
           end
           it 'contains a link to note author' do