--- a/docutil/docpdf.py	Tue Aug 15 17:01:51 2017 +0300
+++ b/docutil/docpdf.py	Tue Aug 15 22:38:43 2017 +0300
@@ -47,14 +47,14 @@
     return None
 
 
-def open_win_pdf(readerexepath, pdffile, pagenum = None):
+def open_win_pdf(readerexepath, pdffile, pagenum=None):
     if pagenum is not None:
         os.spawnl(os.P_DETACH, readerexepath, "AcroRd32.exe", "/A", "page=%d=OpenActions" % pagenum, '"%s"' % pdffile)
     else:
         os.spawnl(os.P_DETACH, readerexepath, "AcroRd32.exe", '"%s"' % pdffile)
 
 
-def open_lin_pdf(readerexepath, pdffile, pagenum = None):
+def open_lin_pdf(readerexepath, pdffile, pagenum=None):
     if pagenum is None:
         os.system("%s -remote DS301 %s &" % (readerexepath, pdffile))
     else:
@@ -62,7 +62,7 @@
         os.system("%s -remote DS301 %s %d &" % (readerexepath, pdffile, pagenum))
 
 
-def open_pdf(pdffile, pagenum = None):
+def open_pdf(pdffile, pagenum=None):
     if wx.Platform == '__WXMSW__':
         try:
             readerpath = get_acroversion()