Minor doc wording update.

Author: ehuss

src/build.rs

@@ -66,10 +66,10 @@ pub type RemoteCreate<'cb> =
 
 /// A builder struct for git tree updates.
 ///
-/// Paths passed to `remove` and `upsert` can be multi-component paths, ie they
+/// Paths passed to `remove` and `upsert` can be multi-component paths, i.e. they
 /// may contain slashes.
 ///
-/// This is the more-cooked tree update facility.  There is also [`TreeBuilder`]
+/// This is a higher-level tree update facility.  There is also [`TreeBuilder`]
 /// which is lower-level (and operates only on one level of the tree at a time).
 ///
 /// [`TreeBuilder`]: crate::TreeBuilder