Use textwrap3 on Python 2

buildtools/config.py

@@ -969,14 +969,3 @@ def updateLicenseFiles(cfg):
     with open('LICENSE.txt', 'w') as f:
         f.write(text)
 
-try:
-    from textwrap import indent
-except ImportError:
-    def indent(text, prefix, predicate=None):
-        if predicate is None:
-            def predicate(line):
-                return line.strip()
-        def prefixed_lines():
-            for line in text.splitlines(True):
-                yield (prefix + line if predicate(line) else line)
-        return ''.join(prefixed_lines())