patch 8.2.4343: when reloading not all properties are detected

Problem:    When reloading not all properties are detected.
Solution:   Add the "edit" value to v:fcs_choice. (Rob Pilling, closes #9579)
diff --git a/runtime/doc/editing.txt b/runtime/doc/editing.txt
index 371450f..5c4b61a 100644
--- a/runtime/doc/editing.txt
+++ b/runtime/doc/editing.txt
@@ -1650,6 +1650,11 @@
 			if it exists now.
 			Once a file has been checked the timestamp is reset,
 			you will not be warned again.
+			Syntax highlighting, marks, diff status,
+			'fileencoding', 'fileformat' and 'binary' options
+			are not changed.  See |v:fcs_choice| to reload these
+			too (for example, if a code formatting tools has
+			changed the file).
 
 :[N]checkt[ime] {filename}
 :[N]checkt[ime] [N]
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 9e1425b..f016c4a 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -2070,6 +2070,11 @@
 		do with the affected buffer:
 			reload		Reload the buffer (does not work if
 					the file was deleted).
+			edit		Reload the buffer and detect the
+					values for options such as
+					'fileformat', 'fileencoding', 'binary'
+					(does not work if the file was
+					deleted).
 			ask		Ask the user what to do, as if there
 					was no autocommand.  Except that when
 					only the timestamp changed nothing