@item sieve-manage-log
@vindex sieve-manage-log
-If non-nil, should be a string naming a buffer where a protocol trace
+If non-@code{nil}, should be a string naming a buffer where a protocol trace
is dumped (for debugging purposes).
@end table
@item sieve-manage-havespace
@findex sieve-manage-havespace
-Returns non-nil iff server have roam for a script of given size.
+Returns non-@code{nil} iff server have roam for a script of given
+size.
@item sieve-manage-getscript
@findex sieve-manage-getscript