Fix bug #1635

With docutils version 0.10 and a lesser version than Python 3 this bug happens:

http://sourceforge.net/p/docutils/bugs/215/

A workaround is done.

doc/tools/doctool

@@ -214,6 +214,19 @@ class LaTeXCustomWriter(latex2e.Writer):
 
 
 
+def docutils_bug_workaround(acc, x):
+    """
+
+    Workarounds this bug: http://sourceforge.net/p/docutils/bugs/215/
+    """
+    problematic_parameter = '--stylesheet-path'
+    if str.find(x, problematic_parameter) == -1:
+        acc.append(x)
+    else:
+        acc.append(problematic_parameter)
+        acc.append([x[str.find(x,'=') + 1:]])
+    return acc
+
 class DocTool(object):
 
     def main(self, argv=None):
@@ -271,7 +284,7 @@ class DocTool(object):
         publish_cmdline(writer_name="html",
                 settings_overrides=HTML_SETTINGS,
                 description=description,
-                argv=list(args),
+                argv=reduce(docutils_bug_workaround, list(args), []),
                 )
 
     def cmd_toplevel(self, cmd, *args):