Ignore Cython debug symbols (#3330)

Cython extension modules built with `gdb_debug=True` spit out debug symbols in the `cython_debug` directory at the top level of the project. The files in this directory contain hardcoded paths and are not shareable/meaningful across environments, so I think it makes sense to include them in a default Python .gitignore.

diff --git a/Python.gitignore b/Python.gitignore
index 762cc89fc8f8656c8fc5004ffc9fc2c5024db225..ba44af1c7c5c9499f5e046fd208c527e552e56a1 100644 (file)
--- a/Python.gitignore
+++ b/Python.gitignore
@@ -133,3 +133,6 @@ dmypy.json
 
 # pytype static type analyzer
 .pytype/
+
+# Cython debug symbols
+cython_debug/