Document complex() with string arg.
diff --git a/Doc/lib/libfuncs.tex b/Doc/lib/libfuncs.tex
index 5870978..f195740 100644
--- a/Doc/lib/libfuncs.tex
+++ b/Doc/lib/libfuncs.tex
@@ -134,11 +134,13 @@
\end{funcdesc}
\begin{funcdesc}{complex}{real\optional{, imag}}
- Create a complex number with the value \var{real} + \var{imag}*j.
+ Create a complex number with the value \var{real} + \var{imag}*j or
+ convert a string or number to a complex number.
Each argument may be any numeric type (including complex).
If \var{imag} is omitted, it defaults to zero and the function
serves as a numeric conversion function like \function{int()},
- \function{long()} and \function{float()}.
+ \function{long()} and \function{float()}; in this case it also
+ accepts a string argument which should be a valid complex number.
\end{funcdesc}
\begin{funcdesc}{delattr}{object, name}