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-rw-r--r--Doc/lib/libstringio.tex1
1 files changed, 1 insertions, 0 deletions
diff --git a/Doc/lib/libstringio.tex b/Doc/lib/libstringio.tex
index 786427ffa6..3992e435e2 100644
--- a/Doc/lib/libstringio.tex
+++ b/Doc/lib/libstringio.tex
@@ -14,6 +14,7 @@ files}). See the description of file objects for operations (section
When a \class{StringIO} object is created, it can be initialized
to an existing string by passing the string to the constructor.
If no string is given, the \class{StringIO} will start empty.
+In both cases, the initial file position starts at zero.
The \class{StringIO} object can accept either Unicode or 8-bit
strings, but mixing the two may take some care. If both are used,