Update README

README.md

@@ -47,6 +47,11 @@ Technically this is data leakage, but since the first token is usually part of
 the prompt (a variable name or field expression) it's probably OK?  But it's
 also pretty weird.
 
+### Indentation
+
+Some decompilations in the dataset have whitespace for indentation included, and
+some do not.
+
 ### `field_access_driver` clang parser
 
 ReSym uses a clang-based parsing tool to extract field accesses.  The tool still