DOC: remove extraneous ininfo from docstring (margin always returns scalar)

murrayrm · murrayrm · commit 9fd6ae7990a0 · 2018-02-24T15:45:19.000-08:00
diff --git a/control/margins.py b/control/margins.py
@@ -340,9 +340,9 @@ def margin(*args):
         Gain margin
     pm : float
         Phase margin (in degrees)
-    wg: float or array_like
+    wg: float
         Gain margin crossover frequency (where phase crosses -180 degrees)
-    wp: float or array_like
+    wp: float
         Phase margin crossover frequency (where gain crosses 0 dB)
 
     Margins are of SISO open-loop. If more than one crossover frequency is
