Fix 500 error for repos with newline in file name

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Gemfile.lock

@@ -108,7 +108,7 @@ GEM
       warden (~> 1.2.1)
     devise-async (0.8.0)
       devise (>= 2.2, < 3.2)
-    diff-lcs (1.2.4)
+    diff-lcs (1.2.5)
     dotenv (0.8.0)
     email_spec (1.4.0)
       launchy (~> 2.1)
@@ -171,7 +171,7 @@ GEM
       stringex (~> 1.5.1)
     gitlab-grack (1.0.1)
       rack (~> 1.4.1)
-    gitlab-grit (2.6.1)
+    gitlab-grit (2.6.2)
       charlock_holmes (~> 0.6.9)
       diff-lcs (~> 1.1)
       mime-types (~> 1.15)