Spelling corrections

A number of spelling corrections as reported by the codespell (see: https://github.com/codespell-project/codespell) program and lists.

Some remarks:
- not considered are grammatical errors
- not considered are names in the code although there are a number that could be improved (like `childs` -> `children`)
- in the documentation it could be made clearer what are variables and what is running text (e.g. by placing variables in running text between backticks)
- some comments are in the French language, I think it would be better to have them in the English (United States version).

1 files changed, 1 insertions, 1 deletions

diff --git a/src/python/test/test_simplex_tree.py b/src/python/test/test_simplex_tree.py
index 688f4fd6..ba8c455f 100755
--- a/src/python/test/test_simplex_tree.py
+++ b/src/python/test/test_simplex_tree.py
@@ -528,7 +528,7 @@ def test_expansion_with_blocker():
 
     def blocker(simplex):
         try:
-            # Block all simplices that countains vertex 6
+            # Block all simplices that contains vertex 6
             simplex.index(6)
             print(simplex, ' is blocked')
             return True