Harmonize Python shebang

Differential Revision: https://reviews.llvm.org/D83857

GitOrigin-RevId: 515bc8c1554f03515565878ea3d35cffdc6fd195
diff --git a/test/update_check.py b/test/update_check.py
index 53c0845..9890843 100644
--- a/test/update_check.py
+++ b/test/update_check.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python3
+#!/usr/bin/env python3
 # -*- coding: UTF-8 -*-
 
 # Polly/LLVM update_check.py
diff --git a/utils/jscop2cloog.py b/utils/jscop2cloog.py
index 0d62646..2938397 100755
--- a/utils/jscop2cloog.py
+++ b/utils/jscop2cloog.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 import argparse, os
 import json
 
diff --git a/utils/pyscop/jscop2iscc.py b/utils/pyscop/jscop2iscc.py
index 3267e8e..42f4cc1 100755
--- a/utils/pyscop/jscop2iscc.py
+++ b/utils/pyscop/jscop2iscc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 import argparse, isl, os
 import json