docs: clarify how the Linux console is deficient: in the arrow keys

doc/nano.1

@@ -303,8 +303,8 @@ cannot be undone any more.  The workaround is, of course, to exit without
 saving.
 .sp
 The recording and playback of keyboard macros works correctly only on a
-terminal emulator, not on a Linux console (VT), because the latter is a
-deficient terminal.
+terminal emulator, not on a Linux console (VT), because the latter does
+not by default distinguish modified from unmodified arrow keys.
 .sp
 Please report any other bugs that you encounter via:
 .br

doc/nano.texi

@@ -569,8 +569,8 @@ cannot be undone any more.  The workaround is, of course, to exit without
 saving.
 
 The recording and playback of keyboard macros works correctly only on a
-terminal emulator, not on a Linux console (VT), because the latter is a
-deficient terminal.
+terminal emulator, not on a Linux console (VT), because the latter does
+not by default distinguish modified from unmodified arrow keys.
 
 @node Built-in Help
 @chapter Built-in Help