Updated example to work and be recognizable by doctest.

README.md

@@ -51,34 +51,34 @@ and the Python API documentation.
 Here is a quick example showing multiple tasks in MontePy:
 
 ```python
-import montepy
-# read in file
-problem = montepy.read_input("foo.imcnp")
+>>> import montepy
+>>> # read in file
+>>> problem = montepy.read_input("tests/inputs/test.imcnp")
 
-# set photon importance for multiple cells
-importances = {1: 0.005,
-    2: 0.1,
-    3: 1.0,
-    99: 1.235
-}
-for cell_num, importance in importances.items():
-    problem.cells[cell_num].importance.photon = importance
-
-#create a universe and fill another cell with it
-universe = montepy.Universe(123)
-problem.univeres.append(universe)
-# add all cells with numbers between 1 and 4
-universe.claim(problem.cells[1:5])
-# fill cell 99 with universe 123
-problem.cells[99].fill.universe = universe
-
-# update all surfaces numbers by adding 1000 to them
-for surface in problem.surfaces:
-    surface.number += 1000
-# all cells using these surfaces will be automatically updated as well
-
-#write out an updated file
-problem.write_problem("foo_update.imcnp")
+>>> # set photon importance for multiple cells
+>>> importances = {1: 0.005,
+...    2: 0.1,
+...    3: 1.0,
+...    99: 1.235
+... }
+>>> for cell_num, importance in importances.items():
+...    problem.cells[cell_num].importance.photon = importance
+
+>>> #create a universe and fill another cell with it
+>>> universe = montepy.Universe(123)
+>>> problem.universes.append(universe)
+>>> # add all cells with numbers between 1 and 4
+>>> universe.claim(problem.cells[1:5])
+>>> # fill cell 99 with universe 123
+>>> problem.cells[99].fill.universe = universe
+
+>>> # update all surfaces numbers by adding 1000 to them
+>>> for surface in problem.surfaces:
+...    surface.number += 1000
+>>> # all cells using these surfaces will be automatically updated as well
+
+>>> #write out an updated file
+>>> problem.write_problem("foo_update.imcnp")
 
 ```