patch 8.2.3749: error messages are everywhere

Problem:    Error messages are everywhere.
Solution:   Move more error messages to errors.h and adjust the names.
diff --git a/src/cmdexpand.c b/src/cmdexpand.c
index 9e88d99..73c5a91 100644
--- a/src/cmdexpand.c
+++ b/src/cmdexpand.c
@@ -406,7 +406,7 @@
 		    // together. Don't really want to wait for this message
 		    // (and possibly have to hit return to continue!).
 		    if (!(options & WILD_SILENT))
-			emsg(_(e_toomany));
+			emsg(_(e_too_many_file_names));
 		    else if (!(options & WILD_NO_BEEP))
 			beep_flush();
 		}