Fix typo in calculation of mitigated daily growth

Author: Eric Smyth

src/penn_chime/parameters.py

@@ -103,7 +103,7 @@ def __init__(
             self.n_days = n_days
 
         self.daily_growth = daily_growth_helper(self.doubling_time)
-        self.daily_growth_t = power(2, 1.9 / self.doubling_time_t)
+        self.daily_growth_t = daily_growth_helper(self.doubling_time_t)
 
     @property
     def n_days(self):

tests/test_app.py

@@ -74,7 +74,7 @@ def test_the_rest_of_header_shows_up():
 def test_daily_growth():
     st.cleanup()
     initial_growth = "and daily growth rate of **12.25%**."
-    mitigated_growth = "and daily growth rate of **1.18%**."
+    mitigated_growth = "and daily growth rate of **9.34%**."
     display_header(st, PARAM)
     assert len((list(filter(lambda s: initial_growth in s, st.render_store))))
     assert len((list(filter(lambda s: mitigated_growth in s, st.render_store))))