added CONTRIBUTING

Martin Björklund · Martin Björklund · commit aa9d25eaaa95 · 2018-10-11T11:55:38.000+02:00
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -0,0 +1,23 @@
+Contributing
+============
+
+Pull requests are welcome!
+
+* Add test cases
+
+* If applicable, update the man page
+
+
+Code style
+----------
+
+* Do not introduce trailing whitespace.
+
+* Do not introduce lines longer than 80 characters.
+
+Hint for emacs users:
+
+(setq whitespace-style (quote (face trailing tabs lines)))
+
+and use whitespace-mode.
+
