@vindex sieve-mode-syntax-table
Sieve mode is derived from @code{c-mode}, and is very similar except
for the syntax of comments. The keymap (@code{sieve-mode-map}) is
-inherited from @code{c-mode}, as are the the variables for customizing
+inherited from @code{c-mode}, as are the variables for customizing
indentation. Sieve mode has its own abbrev table
(@code{sieve-mode-abbrev-table}) and syntax table
(@code{sieve-mode-syntax-table}).