make brackets escapable with backslash

1 files changed, 3 insertions, 0 deletions

diff --git a/zzcxz.cgi b/zzcxz.cgi
index 7fc0724..797f2ea 100755
--- a/zzcxz.cgi
+++ b/zzcxz.cgi
@@ -199,6 +199,9 @@ local function convert_markup(m)
 				table.insert(result, '<pre><code>')
 				code_block = true
 			else
+				line = line:gsub("\\\\([%[%]])", "&#92;%1")
+				line = line:gsub("\\([%[%]])", 
+					{ ['['] = "&#91;", [']'] = "&#93;" })
 				line = line:gsub("%[(.-)%]",
 					function(s)
 						return ('<span class="important">%s</span>'):format(s)