pgen lives in Parser, not Programs.

Apparently, I can't read.
diff --git a/.hgignore b/.hgignore
index 6766bf9..68c607f 100644
--- a/.hgignore
+++ b/.hgignore
@@ -33,7 +33,6 @@
 Modules/Setup.local
 Modules/config.c
 Modules/ld_so_aix$
-Parser/pgen$
 ^lcov-report/
 ^core
 ^python-gdb.py
@@ -88,9 +87,9 @@
 Tools/unicode/MAPPINGS/
 BuildLog.htm
 __pycache__
+Parser/pgen{,.exe}
 Programs/_freeze_importlib{,.exe}
 Programs/_testembed{,.exe}
-Programs/pgen.exe
 .coverage
 coverage/
 externals/