[css-grid-1][css-grid-2][editorial] Clarify that tracks can't be *fully* intrinsic, but can have an intrinsic length (if paired with a fixed in minmax()). w3c#7238

Author: tabatkins

css-grid-1/Overview.bs

@@ -1757,8 +1757,9 @@ Syntax of ''repeat()''</h5>
 		* The ''repeat()'' notation can’t be nested.
 		* Automatic repetitions (''auto-fill'' or ''auto-fit'')
 			cannot be combined with
-			<a lt="intrinsic sizing function">intrinsic</a>
-			or <a lt="flexible sizing function">flexible</a> sizes.
+			fully <a lt="intrinsic sizing function">intrinsic</a>
+			or <a lt="flexible sizing function">flexible</a> sizes
+			(see grammar).
 
 	Thus the precise syntax of the ''repeat()'' notation
 	has several forms:

css-grid-2/Overview.bs

@@ -1841,8 +1841,9 @@ Syntax of ''repeat()''</h5>
 		* The ''repeat()'' notation can’t be nested.
 		* Automatic repetitions (''auto-fill'' or ''auto-fit'')
 			cannot be combined with
-			<a lt="intrinsic sizing function">intrinsic</a>
-			or <a lt="flexible sizing function">flexible</a> sizes.
+			fully <a lt="intrinsic sizing function">intrinsic</a>
+			or <a lt="flexible sizing function">flexible</a> sizes
+			(see grammar).
 
 	Thus the precise syntax of the ''repeat()'' notation
 	has several forms: