entities: support ' entity

The XHTML standard encompasses the XML standard.

From the beginning, the XML standard [1] has always included required
support for five character entities:

 1. the ampersand (&) as &
 2. the left angle bracket (<) as &lt;
 3. the right angle bracket (>) as &gt;
 4. the double-quote character (") as &quot;
 5. the apostrophe or single-quote character (') as &apos;

See section "2.4 Character Data and Markup" of the XML standard [1]
for further details.

Add support for the character single-quote character entity (&apos;)
in order to fully support XHTML pages.

[1]: https://www.w3.org/TR/REC-xml/

Signed-off-by: Kyle J. McKay <mackyle@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/indep.h b/indep.h
index 2809832..5c6b1da 100644
--- a/indep.h
+++ b/indep.h
@@ -27,7 +27,7 @@ struct growbuf {
 
 extern unsigned char QUOTE_MAP[];
 extern char *HTML_QUOTE_MAP[];
-#define HTML_QUOTE_MASK   0x07	/* &, <, >, " */
+#define HTML_QUOTE_MASK   0x07	/* &, <, >, ", ' */
 #define SHELL_UNSAFE_MASK 0x08	/* [^A-Za-z0-9_./:\200-\377] */
 #define URL_QUOTE_MASK    0x10	/* [\0- \177-\377] */
 #define FILE_QUOTE_MASK   0x30	/* [\0- #%&+:?\177-\377] */