updated snippets generation for adoc format

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>

scripts/split-snippets.py

@@ -1,6 +1,6 @@
 #!/usr/bin/python
 
-# Split source code files into XML snippets for inclusion in the
+# Split source code files into markdown snippets for inclusion in the
 # documentation.
 #
 # Usage: python split-snippets.py TARGET-ROOT INPUT-FILE...
@@ -23,7 +23,7 @@ import sys
 target_root = sys.argv[1]
 
 def output_file_name(dirname, basename):
-    return "{0}/en-US/snippets/{1}-{2}.xml".format(
+    return "{0}/en-US/snippets/{1}-{2}.adoc".format(
         target_root, dirname, basename)
 
 re_open_file = re.compile(
@@ -41,19 +41,11 @@ def extension_to_language(path, map={
 def write_single_file(path, contents, language):
     assert not [ch for ch in language if ch in "<>&\""]
     with file(path, "w") as out:
-        out.write('''<?xml version='1.0' encoding='utf-8' ?>
-<!DOCTYPE programlisting PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
-]>
-<!-- Automatically generated file.  Do not edit. -->
-<programlisting language="''' + language + '''">
-''')
+        out.write("\n")
         for line in contents:
             for ch in line:
-                if ch in "<>&":
-                    out.write("&#{0};".format(ord(ch)))
-                else:
-                    out.write(ch)
-        out.write("</programlisting>\n")
+                 out.write(ch)
+        out.write("\n")
 
 def write_output(output):
     for (outpath, (origpath, contents)) in output.items():