Fix language misidentification of test data [minor]

Linguist was identifying test/dat/mpileup.*.[1-9] as groff (man page) source due to their extensions, inflating the language statistics shown on the GitHub repository.
samtools · Aug 3, 2016 · d1039b9 · d1039b9
1 parent 613501f
commit d1039b9
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/.gitattributes b/.gitattributes
@@ -8,3 +8,6 @@
 .git*           export-ignore
 .travis*        export-ignore
 README.md       export-ignore
+
+# Correct language misidentifications.
+test/**/*.[1-9] linguist-language=none