update .editorconfig (test indent_style = tab)

.editorconfig

@@ -4,7 +4,7 @@
 root = true
 
 [*]
-indent_style = space
+indent_style = tab
 indent_size = 4
 end_of_line = lf
 charset = utf-8
@@ -12,4 +12,5 @@ trim_trailing_whitespace = true
 insert_final_newline = true
 
 [*.md]
-trim_trailing_whitespace = false
+trim_trailing_whitespace = false
+