Typos in documentation

finitedifferences.py

@@ -23,7 +23,7 @@ def grad(var, dim=3):
 def discretizeCenter(term, symbolsToFieldDict, dx, dim=3):
     """
     Expects term that contains given symbols and gradient components of these symbols and replaces them
-    by field accesses. Gradients are replaced centralized approximations:
+    by field accesses. Gradients are replaced by centralized approximations:
     ``(upper neighbor - lower neighbor ) / ( 2*dx)``
     :param term: term where symbols and gradient(symbol) should be replaced
     :param symbolsToFieldDict: mapping of symbols to Field

transformations.py

@@ -608,7 +608,7 @@ def get_type(node):
 
 def insert_casts(node):
     """
-    Inserts casts and dtype where needed
+    Inserts casts and dtype whpere needed
     :param node: ast which should be traversed
     :return: node
     """