[docs] wineusr: Use double quotes around SGML attribute values

[Frédéric Delanoy]

---
 en/wineusr-introduction.sgml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/en/wineusr-introduction.sgml b/en/wineusr-introduction.sgml
index bb578e4..070bb00 100644
--- a/en/wineusr-introduction.sgml
+++ b/en/wineusr-introduction.sgml
@@ -286,7 +286,7 @@
             purchasing these products.
           </para>
       <table><title>Various Wine offerings</title>
-        <tgroup cols=3 align="left">
+        <tgroup cols="3" align="left">
           <thead>
             <row>
               <entry>Product</entry>
-- 
1.8.3.2