diff --git a/.gitignore b/.gitignore
index 70cf8f4..03a3e8c 100755
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,5 @@ main.pdf
 *.out
 
 dupprs/
+
+msr2017\.pdf
diff --git a/main.tex b/main.tex
index 57aa9fe..41de67e 100755
--- a/main.tex
+++ b/main.tex
@@ -37,23 +37,23 @@
 
 
 \input{0-abstract}
-%\begin{CCSXML}
-%<ccs2012>
-%<concept>
-%<concept_id>10011007.10011006.10011073</concept_id>
-%<concept_desc>Software and its engineering~Software maintenance tools</concept_desc>
-%<concept_significance>500</concept_significance>
-%</concept>
-%<concept>
-%<concept_id>10011007.10011074.10011134</concept_id>
-%<concept_desc>Software and its engineering~Collaboration in software development</concept_desc>
-%<concept_significance>500</concept_significance>
-%</concept>
-%</ccs2012>
-%\end{CCSXML}
+\begin{CCSXML}
+<ccs2012>
+<concept>
+<concept_id>10011007.10011006.10011073</concept_id>
+<concept_desc>Software and its engineering~Software maintenance tools</concept_desc>
+<concept_significance>500</concept_significance>
+</concept>
+<concept>
+<concept_id>10011007.10011074.10011134</concept_id>
+<concept_desc>Software and its engineering~Collaboration in software development</concept_desc>
+<concept_significance>500</concept_significance>
+</concept>
+</ccs2012>
+\end{CCSXML}
 
-%\ccsdesc[500]{Software and its engineering~Software maintenance tools}
-%\ccsdesc[500]{Software and its engineering~Collaboration in software development}
+\ccsdesc[500]{Software and its engineering~Software maintenance tools}
+\ccsdesc[500]{Software and its engineering~Collaboration in software development}
 
 \keywords{Duplicate pull-request, distributed software development, GitHub}
 \maketitle