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-rw-r--r--src/print.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/print.c b/src/print.c
index 7e9ed30c32b..12960ef214d 100644
--- a/src/print.c
+++ b/src/print.c
@@ -759,7 +759,8 @@ DEFUN ("prin1-to-string", Fprin1_to_string, Sprin1_to_string, 1, 2, 0,
doc: /* Return a string containing the printed representation of OBJECT.
OBJECT can be any Lisp object. This function outputs quoting characters
when necessary to make output that `read' can handle, whenever possible,
-unless the optional second argument NOESCAPE is non-nil.
+unless the optional second argument NOESCAPE is non-nil. For complex objects,
+the behavior is controlled by `print-level' and `print-length', which see.
OBJECT is any of the Lisp data types: a number, a string, a symbol,
a list, a buffer, a window, a frame, etc.