[Documentation Changes] Parameter description change for reduction apis (#881)

* [Documentation Changes] Parameter description change for reduction api

The parameter description is updated for max, min, argmax and argmin

* Lint changes on patch-3 of reduction.py

topi/python/topi/reduction.py

@@ -186,9 +186,9 @@ def max(data, axis=None, keepdims=False):
         The input tvm tensor
 
     axis : None or int or tuple of int
-        Axis or axes along which a sum is performed.
-        The default, axis=None, will sum all of the elements of the input array.
-        If axis is negative it counts from the last to the first axis.
+        Axis or axes along which the max operation is performed.
+        The default, axis=None, will find the max element from all of the elements of the input
+        array. If axis is negative it counts from the last to the first axis.
 
     keepdims : bool
         If this is set to True, the axes which are reduced are left in the result as dimensions
@@ -212,9 +212,9 @@ def min(data, axis=None, keepdims=False):
         The input tvm tensor
 
     axis : None or int or tuple of int
-        Axis or axes along which a sum is performed.
-        The default, axis=None, will sum all of the elements of the input array.
-        If axis is negative it counts from the last to the first axis.
+        Axis or axes along which a minimum operation is performed.
+        The default, axis=None, will find the minimum element from all of the elements of the
+        input array. If axis is negative it counts from the last to the first axis.
 
     keepdims : bool
         If this is set to True, the axes which are reduced are left in the result as dimensions
@@ -238,9 +238,9 @@ def argmax(data, axis=None, keepdims=False):
         The input tvm tensor
 
     axis : None or int or tuple of int
-        Axis or axes along which a sum is performed.
-        The default, axis=None, will sum all of the elements of the input array.
-        If axis is negative it counts from the last to the first axis.
+        Axis or axes along which a argmax operation is performed.
+        The default, axis=None, will find the indices of the maximum element of the elements of
+        the input array. If axis is negative it counts from the last to the first axis.
 
     keepdims : bool
         If this is set to True, the axes which are reduced are left in the result as dimensions
@@ -265,9 +265,9 @@ def argmin(data, axis=None, keepdims=False):
         The input tvm tensor
 
     axis : None or int or tuple of int
-        Axis or axes along which a sum is performed.
-        The default, axis=None, will sum all of the elements of the input array.
-        If axis is negative it counts from the last to the first axis.
+        Axis or axes along which a argmin operation is performed.
+        The default, axis=None, will find the indices of minimum element all of the elements of
+        the input array. If axis is negative it counts from the last to the first axis.
 
     keepdims : bool
         If this is set to True, the axes which are reduced are left in the result as dimensions