Write "generated by Cython" header also in .h files

Cython/Compiler/Code.py

@@ -30,6 +30,7 @@ from . import Naming
 from . import Options
 from . import DebugFlags
 from . import StringEncoding
+from . import Version
 from .. import Utils
 from .Scanning import SourceDescriptor
 from ..StringIOTree import StringIOTree
@@ -1818,6 +1819,10 @@ class CCodeWriter(object):
             self.putln("%sconst char *%s = NULL;" % (unused, Naming.filename_cname))
             self.putln("%sint %s = 0;" % (unused, Naming.clineno_cname))
 
+    def put_generated_by(self):
+        self.putln("/* Generated by Cython %s */" % Version.watermark)
+        self.putln("")
+
     def put_h_guard(self, guard):
         self.putln("#ifndef %s" % guard)
         self.putln("#define %s" % guard)

Cython/Compiler/ModuleNode.py

@@ -21,7 +21,6 @@ from . import Naming
 from . import Nodes
 from . import Options
 from . import TypeSlots
-from . import Version
 from . import PyrexTypes
 
 from .Errors import error, warning
@@ -140,6 +139,7 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
             else:
                 i_code = None
 
+            h_code.put_generated_by()
             h_guard = Naming.h_guard_prefix + self.api_name(env)
             h_code.put_h_guard(h_guard)
             h_code.putln("")
@@ -207,6 +207,7 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
             result.api_file = replace_suffix(result.c_file, "_api.h")
             h_code = Code.CCodeWriter()
             Code.GlobalState(h_code, self)
+            h_code.put_generated_by()
             api_guard = Naming.api_guard_prefix + self.api_name(env)
             h_code.put_h_guard(api_guard)
             h_code.putln('#include "Python.h"')
@@ -562,8 +563,7 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
             self.generate_cfunction_declarations(module, modulecode, defined_here)
 
     def generate_module_preamble(self, env, cimported_modules, metadata, code):
-        code.putln("/* Generated by Cython %s */" % Version.watermark)
-        code.putln("")
+        code.put_generated_by()
         if metadata:
             code.putln("/* BEGIN: Cython Metadata")
             code.putln(json.dumps(metadata, indent=4, sort_keys=True))