+TIDY = tidy -latin1 -q -modify -indent -wrap 120 --tidy-mark no --preserve-entities yes \
+ --mute MISSING_ATTRIBUTE --mute TRIM_EMPTY_ELEMENT
+# -latin1
+# use ISO-8859-1 for both input and output
+# docbook output is ISO-8859 and tidy assumes UTF-8
+# -q
+# suppress nonessential output
+# -modify
+# modify the original input file
+# --mute MISSING_ATTRIBUTE
+# don't show <img> lacks "alt" attribute
+# or <table> lacks "summary" attribute
+# --mute TRIM_EMPTY_ELEMENT
+# don't show trimming empty <p>
+#