small updates to example files

examples/probe/555-timer-2.cir

@@ -73,7 +73,7 @@
     R3 2 3 1k
     R4 3 4 5k
     C3 4 0 0.5u ; 0.15u
-    X2 4  1  res  6  4  3  2 ua555
+    XU2 4  1  res  6  4  3  2 ua555
 *      TR O  R    F  TH D  V
     RA 2 17 1k ; 5k
     RB 17 16 5k ; 3k

examples/probe/mos-test.cir

@@ -14,9 +14,9 @@ mp1 out in dd dd pm
 .tran 5n 500n
 
 * inputs o.k.
-.probe i(mp1:s) i(mn1:s) v(in) v(out) vd(mn1:d:s) vd(mp1:1, mn1:1)
+.probe i(mp1:s) i(mn1:s) v(in) v(out) vd(mn1:d:s) vd(mp1:1, mn1:1) vd(mn1:1:0)
 
-* buggy inputs
+* buggy inputs (to check the error messages)
 .probe i(mn1:z) vd(mp1:0:0) vd(mp1:1:1) hhhh) i(:u) VD(z) i(()) vd(:0:0) i(:z)
 
 .save @mn1[id]
@@ -27,8 +27,9 @@ display
 set xbrushwidth=2
 *plot commands o.k.
 plot i(mn1:s) i(mp1:s)
-*buggy plot commands
+*buggy plot command
 plot i(mp1:8)
+* plot o.k.
 plot in out
 plot  @mn1[id] - i(mn1:s)
 .endc