3 files changed, 9 insertions, 2 deletions
diff --git a/htindex b/htindex
index accd0be..b3f88f1 100755
--- a/htindex
+++ b/htindex
@@ -67,8 +67,12 @@ source $* | awk '
 		gsub("[ÙÚÛÜùúûü]", "u", s)
 		gsub("[×]", "x", s)
 		gsub("[Ýýÿ]", "y", s)
-		gsub("[^-a-z_ 	]", "", s)
-		gsub("[ 	]+", "-", s)
+		gsub("[/]", "-", s)
+		gsub("[ 	\n]+\\+[ 	\n]+", "+", s)
+		gsub("[ 	\n]+=[ 	\n]+", "=", s)
+		gsub("[ 	\n]+", "-", s)
+		gsub("[^=-+a-z0-9_ 	]", "", s)
+		gsub("-+", "-", s)
 		return s
 	}
 '
diff --git a/test.em b/test.em
index 95facea..0f44abb 100644
--- a/test.em
+++ b/test.em
@@ -36,5 +36,7 @@ ordered list item.
  long term: long
 definition
 
+=== 1 + 1 = 2 ===
+
 	code block
 	with two lines
diff --git a/test.html b/test.html
index 5a76eaf..089f1a6 100644
--- a/test.html
+++ b/test.html
@@ -57,6 +57,7 @@ ordered list item.
 definition
 </dd>
 </dl>
+<h3 id="1+1=2">1 + 1 = 2</h3>
 <pre>
 code block
 with two lines