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-rw-r--r--lib/libc/locale/isblank.32
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/libc/locale/isblank.3 b/lib/libc/locale/isblank.3
index c0ec34d..545cbe6 100644
--- a/lib/libc/locale/isblank.3
+++ b/lib/libc/locale/isblank.3
@@ -46,6 +46,8 @@
The
.Fn isblank
function tests for a space or tab character.
+For 8-bit wide locales the value of the argument is
+representable as an unsigned char or the value of EOF.
.Sh RETURN VALUES
The
.Fn isblank
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