patch 8.2.3961: error messages are spread out

Problem:    Error messages are spread out.
Solution:   Move more errors to errors.h.
diff --git a/src/fileio.c b/src/fileio.c
index 5a731a8..73c7243 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -2406,7 +2406,7 @@
 	{
 	    if (!(flags & READ_DUMMY))
 	    {
-		filemess(curbuf, sfname, (char_u *)_(e_interr), 0);
+		filemess(curbuf, sfname, (char_u *)_(e_interrupted), 0);
 		if (newfile)
 		    curbuf->b_p_ro = TRUE;	// must use "w!" now
 	    }