DEV: Enable unless cops

We discussed the use of `unless` internally and decided to enforce
available rules from rubocop to restrict its most problematic uses.

lib/onebox/engine/allowlisted_generic_onebox.rb

@@ -145,12 +145,12 @@ module Onebox
                  !!AllowlistedGenericOnebox.allowed_twitter_labels.find { |l|
                    d[:label2] =~ /#{l}/i
                  }
-              unless Onebox::Helpers.blank?(d[:label_1])
-                d[:label_2] = Onebox::Helpers.truncate(d[:label2])
-                d[:data_2] = Onebox::Helpers.truncate(d[:data2])
-              else
+              if Onebox::Helpers.blank?(d[:label_1])
                 d[:label_1] = Onebox::Helpers.truncate(d[:label2])
                 d[:data_1] = Onebox::Helpers.truncate(d[:data2])
+              else
+                d[:label_2] = Onebox::Helpers.truncate(d[:label2])
+                d[:data_2] = Onebox::Helpers.truncate(d[:data2])
               end
             end
 

lib/onebox/engine/wikipedia_onebox.rb

@@ -23,7 +23,9 @@ module Onebox
           m_url_hash_name = m_url_hash[1]
         end
 
-        unless m_url_hash.nil?
+        if m_url_hash.nil? # no hash found in url
+          paras = raw.search("p") # default get all the paras
+        else
           section_header_title = raw.xpath("//span[@id='#{CGI.unescape(m_url_hash_name)}']")
 
           if section_header_title.empty?
@@ -49,8 +51,6 @@ module Onebox
               end
             end
           end
-        else # no hash found in url
-          paras = raw.search("p") # default get all the paras
         end
 
         unless paras.empty?

lib/onebox/helpers.rb

@@ -40,8 +40,8 @@ module Onebox
       should_ignore_canonical =
         IGNORE_CANONICAL_DOMAINS.map { |hostname| uri.hostname.match?(hostname) }.any?
 
-      unless (ignore_canonical_tag && ignore_canonical_tag["content"].to_s == "true") ||
-               should_ignore_canonical
+      if !(ignore_canonical_tag && ignore_canonical_tag["content"].to_s == "true") &&
+           !should_ignore_canonical
         # prefer canonical link
         canonical_link = doc.at('//link[@rel="canonical"]/@href')
         canonical_uri = Addressable::URI.parse(canonical_link)

lib/onebox/mixins/git_blob_onebox.rb

@@ -120,15 +120,15 @@ module Onebox
           a_lines.each do |l|
             l = l.chomp("\n") # remove new line
             m = l.match(/\A[ ]*/) # find leading spaces 0 or more
-            unless m.nil? || l.size == m[0].size || l.size == 0 # no match | only spaces in line | empty line
+            if m.nil? || l.size == m[0].size || l.size == 0
+              next # SKIP no match or line is only spaces
+            else # no match | only spaces in line | empty line
               m_str_length = m[0].size
               if m_str_length <= 1 # minimum space is 1 or nothing we can break we found our minimum
                 min_space = m_str_length
                 break #stop iteration
               end
               min_space = m_str_length if m_str_length < min_space
-            else
-              next # SKIP no match or line is only spaces
             end
           end
           a_lines.each do |l|