diff --git a/Common.gitattributes b/Common.gitattributes
index dd36ae3..070a21a 100644
--- a/Common.gitattributes
+++ b/Common.gitattributes
@@ -10,16 +10,16 @@
 
 # Documents
 *.bibtex   text diff=bibtex
-*.doc	        diff=astextplain
-*.DOC	        diff=astextplain
-*.docx          diff=astextplain
-*.DOCX          diff=astextplain
-*.dot           diff=astextplain
-*.DOT           diff=astextplain
-*.pdf           diff=astextplain
-*.PDF           diff=astextplain
-*.rtf           diff=astextplain
-*.RTF	        diff=astextplain
+*.doc      diff=astextplain
+*.DOC      diff=astextplain
+*.docx     diff=astextplain
+*.DOCX     diff=astextplain
+*.dot      diff=astextplain
+*.DOT      diff=astextplain
+*.pdf      diff=astextplain
+*.PDF      diff=astextplain
+*.rtf      diff=astextplain
+*.RTF      diff=astextplain
 *.md       text
 *.tex      text diff=tex
 *.adoc     text