document iswspace and remove wrongly-included zwsp character

diff --git a/src/ctype/iswspace.c b/src/ctype/iswspace.c
index 0b9173df0cc35b5ff82f85acc87b685390208563..99d517e6fa9a01b84039610e3f501df1909b7539 100644 (file)
--- a/src/ctype/iswspace.c
+++ b/src/ctype/iswspace.c
@@ -2,12 +2,16 @@
 #include <wctype.h>
 #include <ctype.h>
 
+/* Our definition of whitespace is the Unicode White_Space property,
+ * minus non-breaking spaces (U+00A0, U+2007, and U+202F) and script-
+ * specific characters with non-blank glyphs (U+1680 and U+180E). */
+
 int iswspace(wint_t wc)
 {
        static const wchar_t spaces[] = {
                ' ', '\t', '\n', '\r', 11, 12,  0x0085,
                0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005,
-               0x2006, 0x2008, 0x2009, 0x200a, 0x200b,
+               0x2006, 0x2008, 0x2009, 0x200a,
                0x2028, 0x2029, 0x205f, 0x3000, 0
        };
        if (wcschr(spaces, wc)) return 1;