[libpng16] Add PD license to new "reindent" tool; remove unused environment var
I didn't intend to distribute this but it leaked into the libpng16 source,
so here it is.
diff --git a/contrib/tools/reindent b/contrib/tools/reindent
index 1bc827f..f9f580a 100644
--- a/contrib/tools/reindent
+++ b/contrib/tools/reindent
@@ -1,13 +1,22 @@
#!/bin/sh
-# reindent inputabsize outputabsize inputcontinuestring outputcontinuestring
-# eg, to change libpng coding style from 3-space indentation to 4-space
-#
-# reindent 3 4 " " " " < example.c.orig > example.c
+# reindent a libpng C source
+
+# COPYRIGHT: Written by Glenn Randers-Pehrson, 2016.
+# To the extent possible under law, the author has waived all copyright and
+# related or neighboring rights to this work. This work is published from:
+# United States.
+
+# Usage:
+# reindent inputtabsize outputtabsize inputcontinuestring outputcontinuestring
#
# Assumes that continued lines begin with indentation plus one space, and
# that continued comments begin with indentation plus " *".
+#
+# eg, to change libpng coding style from 3-space indentation to 4-space
+#
+# reindent 3 4 " " " " < example.c > example.c_reindented
-unexpand --first-only --t $inputtabsize $1 | \
+unexpand --first-only --t $1 | \
sed -e "/^ $3[^\*]/{s/ $3/ $4/}" | \
expand -t $2
