Merge branch 'zj-fix-index-rails' into 'master'

Use Ruby methods, not Rails' String#first See merge request gitlab-org/gitlab-ce!18669

Merge branch 'zj-fix-index-rails' into 'master'
3fcb9c11 · Douwe Maan · c0991321 · 5e75d377 · 3fcb9c11
Commit 3fcb9c11 authored May 01, 2018 by Douwe Maan
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raw_diff_change.rb lib/gitlab/git/raw_diff_change.rb +3 -1

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--- a/lib/gitlab/git/raw_diff_change.rb
+++ b/lib/gitlab/git/raw_diff_change.rb
@@ -38,7 +38,9 @@ module Gitlab
      end

      def extract_operation
-        case @raw_operation&.first(1)
+        return :unknown unless @raw_operation
+
+        case @raw_operation[0]
        when 'A'
          :added
        when 'C'