Merge pull request #4255 from BrokenEagle/additional-twitter-hashtag

Add additional Twitter hashtag

app/logical/sources/strategies/twitter.rb

@@ -21,6 +21,7 @@ module Sources::Strategies
     # the pattern to avoid creating empty strings.
     COMMON_TAG_REGEXES = [
       /(?<!\A)生誕祭(?:\d*)\z/,
+      /(?<!\A)誕生祭(?:\d*)\z/,
       /(?<!\A)版もうひとつの深夜の真剣お絵描き60分一本勝負(?:_\d+)?\z/,
       /(?<!\A)版深夜の真剣お絵描き60分一本勝負(?:_\d+)?\z/,
       /(?<!\A)深夜の真剣お絵描き60分一本勝負(?:_\d+)?\z/,
@@ -138,8 +139,9 @@ module Sources::Strategies
 
     def normalize_tag(tag)
       COMMON_TAG_REGEXES.each do |rg|
-        if tag.match(rg)
-          return tag.gsub(rg,"")
+        norm_tag = tag.gsub(rg,"")
+        if norm_tag != tag
+          return norm_tag
         end
       end
       tag