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-rw-r--r--stdlib/printf.mli1
1 files changed, 1 insertions, 0 deletions
diff --git a/stdlib/printf.mli b/stdlib/printf.mli
index 059779922b..43106505a3 100644
--- a/stdlib/printf.mli
+++ b/stdlib/printf.mli
@@ -78,6 +78,7 @@ val fprintf : out_channel -> ('a, out_channel, unit) format -> 'a
type as [fmt].
- [!]: take no argument and flush the output.
- [%]: take no argument and output one [%] character.
+ - [,]: the no-op delimiter for conversion specifications.
The optional [flags] are:
- [-]: left-justify the output (default is right justification).