runtime(compiler): update errorformat for dot and neato compiler (#14257)

* add errorformat for dot compiler
* add errorformat for neato compiler

Signed-off-by: Konfekt <Konfekt@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/compiler/neato.vim b/runtime/compiler/neato.vim
index bd184b7..102c16e 100644
--- a/runtime/compiler/neato.vim
+++ b/runtime/compiler/neato.vim
@@ -1,7 +1,7 @@
 " Vim compiler file
 " Compiler:     ATT neato
 " Maintainer:	Marcos Macedo <bar4ka@bol.com.br>
-" Last Change:	2004 May 16
+" Last Change:	2024 March 21
 
 if exists("current_compiler")
   finish
@@ -13,3 +13,6 @@
 endif
 
 CompilerSet makeprg=neato\ -T$*\ \"%:p\"\ -o\ \"%:p:r.$*\"
+" matches error messages as below skipping final part after line number
+" Error: ./file.dot: syntax error in line 1 near 'rankdir'
+CompilerSet errorformat=%trror:\ %f:\ %m\ in\ line\ %l%.%#