filesets: use example with quotes for encoding predicate
A user on IRC was confused that "encoding(ASCII)" works and
"encoding(UTF-8)" fails with "parse error: encoding requires an
encoding name".
--- a/mercurial/help/filesets.txt Sun Jan 08 23:09:35 2012 +0800
+++ b/mercurial/help/filesets.txt Tue Jan 10 15:20:16 2012 +0100
@@ -52,7 +52,7 @@
- Find C files in a non-standard encoding::
- hg locate "set:**.c and not encoding(ascii)"
+ hg locate "set:**.c and not encoding('UTF-8')"
- Revert copies of large binary files::