Improve .editorconfig

Author: tensor5

.editorconfig

@@ -1,2 +1,15 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_size = 4
+indent_style = space
+trim_trailing_whitespace = true
+
 [PKGBUILD]
 indent_size = 2
+
+[*.patch]
+trim_trailing_whitespace = false