Align with spec-factory

Follows whatwg/spec-factory#7

.editorconfig

@@ -4,16 +4,19 @@ root = true
 end_of_line = lf
 insert_final_newline = true
 charset = utf-8
-indent_size = 1
+indent_size = 2
 indent_style = space
 trim_trailing_whitespace = true
 max_line_length = 100
 
 [Makefile]
 indent_style = tab
 
-[.travis.yml]
-indent_size = 2
+[*.bs]
+indent_size = 1
+
+[*.py]
+indent_size = 4
 
 [*.js]
 max_line_length = 120

.pr-preview.json

@@ -1,9 +1,9 @@
 {
-    "src_file": "index.bs",
-    "type": "bikeshed",
-    "params": {
-        "force": 1,
-        "md-status": "LS-PR",
-        "md-Text-Macro": "PR-NUMBER {{ pull_request.number }}"
-    }
+  "src_file": "index.bs",
+  "type": "bikeshed",
+  "params": {
+    "force": 1,
+    "md-status": "LS-PR",
+    "md-Text-Macro": "PR-NUMBER {{ pull_request.number }}"
+  }
 }