normalize eol via .gitattributes

.gitattributes

+# All text files should have the "lf" (Unix) line endings
+* text eol=lf
+
+# Explicitly declare text files you want to always be normalized and converted
+# to native line endings on checkout.
+*.java text
+*.js text
+*.css text
+*.html text
+*.properties text
+*.xml text
+*.yml text
+
+# Denote all files that are truly binary and should not be modified.
+*.png binary
+*.jpg binary
+*.jar binary