[Truffle] Untagged passing Encoding.find specs.

Author: nirvdrum

spec/truffle/tags/core/encoding/find_tags.txt

@@ -1,13 +1,8 @@
-fails:Encoding.find returns the corresponding Encoding object if given a valid encoding name
 fails:Encoding.find returns the corresponding Encoding object if given a valid alias name
-fails:Encoding.find raises a TypeError if passed a Symbol
 fails:Encoding.find returns the passed Encoding object
-fails:Encoding.find accepts encoding names as Strings
 fails:Encoding.find accepts any object as encoding name, if it responds to #to_str
-fails:Encoding.find is case insensitive
 fails:Encoding.find raises an ArgumentError if the given encoding does not exist
 fails:Encoding.find supports the 'locale' encoding alias
 fails:Encoding.find returns default external encoding for the 'external' encoding alias
 fails:Encoding.find returns default internal encoding for the 'internal' encoding alias
 fails:Encoding.find uses default external encoding for the 'filesystem' encoding alias
-fails(windows - Encoding.aliases):Encoding.find needs to be reviewed for spec completeness