fix bad encode char

src/operator/contrib/allclose_op-inl.h

@@ -58,8 +58,8 @@ struct AllCloseParam : public dmlc::Parameter<AllCloseParam> {
       .describe("Absolute tolerance.");
     DMLC_DECLARE_FIELD(equal_nan)
       .set_default(true)
-      .describe("Whether to compare NaN’s as equal. If True, NaN’s in A will be considered equal "
-                "to NaN’s in B in the output array.");
+      .describe("Whether to compare NaN's as equal. If True, NaN's in A will be considered equal "
+                "to NaN's in B in the output array.");
   }
 };
 

src/operator/numpy/np_einsum_op-inl.h

@@ -394,7 +394,7 @@ struct NumpyEinsumParam: public dmlc::Parameter<NumpyEinsumParam> {
       .set_default("")
       .describe("Specifies the subscripts for summation as comma separated list"
       " of subscript labels. An implicit (classical Einstein summation) calculation"
-      " is performed unless the explicit indicator ‘->’ is included as well as"
+      " is performed unless the explicit indicator '->' is included as well as"
       " subscript labels of the precise output form.");
     DMLC_DECLARE_FIELD(optimize)
       .set_default(0);