commented out example code that was broken

examples/manipulate_lattice/manipulate_lattice.py

@@ -201,6 +201,10 @@ idx_elem_bpm_y = [lat.lst[i].idx_elem for i in idx_bpm_y]
 
 ###########################################################################
 
+
+# YL comment: code below is broken (step_x, step_y, Nrun and more not defined)
+# Commented out so the flake8 test doesn't fail
+
 # # -- Define indices for blocks of R-matrix from "step" (may be too much...)
 
 # block_x = []