patch 8.2.2402: some filetypes not detected

Problem:    Some filetypes not detected.
Solution:   Detect Ruby Signature and Puppet related files. (Doug Kearns)

runtime/filetype.vim

@@ -1176,9 +1176,10 @@ au BufNewFile,BufRead *.papp,*.pxml,*.pxsl	setf papp
 " Password file
 au BufNewFile,BufRead */etc/passwd,*/etc/passwd-,*/etc/passwd.edit,*/etc/shadow,*/etc/shadow-,*/etc/shadow.edit,*/var/backups/passwd.bak,*/var/backups/shadow.bak setf passwd
 
-" Pascal (also *.p)
+" Pascal (also *.p, *.pp, *.inc)
 au BufNewFile,BufRead *.pas			setf pascal
 
+" Pascal or Puppet manifest
 au BufNewFile,BufRead *.pp			call dist#ft#FTpp()
 
 " Delphi or Lazarus program file
@@ -1269,7 +1270,7 @@ au BufNewFile,BufRead *.pov			setf pov
 " Povray configuration
 au BufNewFile,BufRead .povrayrc			setf povini
 
-" Povray, PHP or assembly
+" Povray, Pascal, PHP or assembly
 au BufNewFile,BufRead *.inc			call dist#ft#FTinc()
 
 " Printcap and Termcap
@@ -1278,13 +1279,19 @@ au BufNewFile,BufRead *printcap
 au BufNewFile,BufRead *termcap
 	\ let b:ptcap_type = "term" | setf ptcap
 
-" PCCTS / ANTRL
-"au BufNewFile,BufRead *.g			setf antrl
+" PCCTS / ANTLR
+"au BufNewFile,BufRead *.g			setf antlr
 au BufNewFile,BufRead *.g			setf pccts
 
 " PPWizard
 au BufNewFile,BufRead *.it,*.ih			setf ppwiz
 
+" Puppet
+au BufNewFile,BufRead Puppetfile		setf ruby
+
+" Embedded Puppet
+au BufNewFile,BufRead *.epp			setf epuppet
+
 " Obj 3D file format
 " TODO: is there a way to avoid MS-Windows Object files?
 au BufNewFile,BufRead *.obj			setf obj
@@ -1427,8 +1434,8 @@ au BufNewFile,BufRead *.rb,*.rbw		setf ruby
 " RubyGems
 au BufNewFile,BufRead *.gemspec			setf ruby
 
-" Rust
-au BufNewFile,BufRead *.rs			setf rust
+" RBS (Ruby Signature)
+au BufNewFile,BufRead *.rbs			setf rbs
 
 " Rackup
 au BufNewFile,BufRead *.ru			setf ruby
@@ -1442,6 +1449,9 @@ au BufNewFile,BufRead *.builder,*.rxml,*.rjs	setf ruby
 " Rantfile and Rakefile is like Ruby
 au BufNewFile,BufRead [rR]antfile,*.rant,[rR]akefile,*.rake	setf ruby
 
+" Rust
+au BufNewFile,BufRead *.rs			setf rust
+
 " S-lang (or shader language, or SmallLisp)
 au BufNewFile,BufRead *.sl			setf slang