ConfigParser:

- DuplicateSectionError is only raised by add_section()
(closes SF bug #830449)

Doc/lib/libcfgparser.tex

@@ -86,9 +86,8 @@ Exception raised when a specified section is not found.
 \end{excdesc}
 
 \begin{excdesc}{DuplicateSectionError}
-Exception raised when multiple sections with the same name are found,
-or if \method{add_section()} is called with the name of a section that 
-is already present.
+Exception raised if \method{add_section()} is called with the name of
+a section that is already present.
 \end{excdesc}
 
 \begin{excdesc}{NoOptionError}