edit(grammar): Add space between words

From "where `x.py`is" -> "where `x.py` is"

Author: colelawrence

x-py.md

@@ -260,7 +260,7 @@ documentation you want.
 By default `rustc` does not build the compiler for it's internal items.
 Mostly because this is useless for the average user. However, you might need to
 have it available so you can understand the types. Here's how you can compile it
-yourself. From the top level directory where `x.py`is located run:
+yourself. From the top level directory where `x.py` is located run:
 
 ```bash
 cp src/bootstrap/config.toml.example config.toml