Patch #1550800: make exec a function.
diff --git a/Doc/ref/reswords.py b/Doc/ref/reswords.py
index 68862bb..53b8dc8 100644
--- a/Doc/ref/reswords.py
+++ b/Doc/ref/reswords.py
@@ -9,7 +9,7 @@
     words.sort()
     colwidth = 1 + max(map(len, words))
     nwords = len(words)
-    nrows = (nwords + ncols - 1) / ncols
+    nrows = (nwords + ncols - 1) // ncols
     for irow in range(nrows):
         for icol in range(ncols):
             i = irow + icol * nrows