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-rw-r--r--internal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index e2c90e79b63..e10bf64b46d 100644
--- a/internal.h
+++ b/internal.h
@@ -600,6 +600,7 @@ size_t rb_strftime(char *s, size_t maxsize, const char *format, rb_encoding *enc
#endif
/* string.c */
+VALUE rb_fstring(VALUE);
int rb_str_buf_cat_escaped_char(VALUE result, unsigned int c, int unicode_p);
int rb_str_symname_p(VALUE);
VALUE rb_str_quote_unprintable(VALUE);