Use relative pathnames for all banners

Author: jdemeyer

autogen/generator.py

@@ -21,34 +21,34 @@
 from .doc import get_rest_doc
 
 
-gen_banner = '''# This file is auto-generated by {}
+autogen_top = "# This file is auto-generated by {}\n".format(
+        os.path.relpath(__file__))
 
+gen_banner = autogen_top + '''
 cdef class Gen_auto:
     """
     Part of the :class:`Gen` class containing auto-generated functions.
 
     This class is not meant to be used directly, use the derived class
     :class:`Gen` instead.
     """
-'''.format(os.path.relpath(__file__, os.getcwd()))
-
-instance_banner = '''# This file is auto-generated by {}
+'''
 
+instance_banner = autogen_top + '''
 cdef class Pari_auto:
     """
     Part of the :class:`Pari` class containing auto-generated functions.
 
     You must never use this class directly (in fact, Python may crash
     if you do), use the derived class :class:`Pari` instead.
     """
-'''.format(os.path.relpath(__file__, os.getcwd()))
-
-decl_banner='''# This file is auto-generated by {}
+'''
 
+decl_banner = autogen_top + '''
 from .types cimport *
 
 cdef extern from *:
-'''.format(__file__)
+'''
 
 
 function_re = re.compile(r"^[A-Za-z][A-Za-z0-9_]*$")