doc/tutorial/basics: some documentation improvments

Change-Id: I9594d34547b11a38619b74001c42e35950feb6c4
diff --git a/doc/tutorial/basics/imports.md b/doc/tutorial/basics/imports.md
index a05dce3..c6fdf59 100644
--- a/doc/tutorial/basics/imports.md
+++ b/doc/tutorial/basics/imports.md
@@ -3,7 +3,7 @@
 # Imports
 
 A CUE file may import definitions from builtin or user-defined packages.
-The CUE file itself does not need to be part of a package to use imports.
+A CUE file does not need to be part of a package to use imports.
 
 The example here shows the use of builtin packages.