Fixing a typo

Author: emma58

pyomo/contrib/piecewise/transform/epigraph_hypograph.py

@@ -47,7 +47,7 @@ def _transform_pw_linear_expr(self, pw_expr, pw_linear_func, transformation_bloc
         # this is the hypograph (the function is concave)
         elif pw_linear_func.function_type == FunctionType.CONCAVE:
             epigraph = False
-        elif pw_linear_func.funtion_type == FunctionType.UNSPECIFIED:
+        elif pw_linear_func.function_type == FunctionType.UNSPECIFIED:
             # we should autodetect if the dimension isn't insane, yell otherwise
             raise NotImplementedError(
                 "It is (quadratically, in the number of pieces) possible to "