pw_ide: Set 3-space tabs in VS Code

Change-Id: I2c71100d25287c1fac9649d2bd3d340c7cd9fd7d
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/179671
Reviewed-by: Keir Mierle <keir@google.com>
Commit-Queue: Chad Norvell <chadnorvell@google.com>
diff --git a/pw_ide/py/pw_ide/vscode.py b/pw_ide/py/pw_ide/vscode.py
index 683d4c1..76f0f42 100644
--- a/pw_ide/py/pw_ide/vscode.py
+++ b/pw_ide/py/pw_ide/vscode.py
@@ -202,6 +202,7 @@
         "[proto3]": OrderedDict(
             {"editor.defaultFormatter": "zxh404.vscode-proto3"}
         ),
+        "[restructuredtext]": OrderedDict({"editor.tabSize": 3}),
     }
 )