Removed duplicated words in in comments and docs.
diff --git a/Modules/_tracemalloc.c b/Modules/_tracemalloc.c
index 780e8ed..bbe7259 100644
--- a/Modules/_tracemalloc.c
+++ b/Modules/_tracemalloc.c
@@ -104,7 +104,7 @@
Protected by TABLES_LOCK(). */
static size_t tracemalloc_peak_traced_memory = 0;
-/* Hash table used as a set to to intern filenames:
+/* Hash table used as a set to intern filenames:
PyObject* => PyObject*.
Protected by the GIL */
static _Py_hashtable_t *tracemalloc_filenames = NULL;