Disable //line directives for goyacc generated codes

Otherwise the dwarf information of that parser will get messed
up - incomplete and one will not be able to step into that source
code using a debugger (tested it using delve).

Author: yhabteab

internal/filter/lexer.go

@@ -1,4 +1,4 @@
-//go:generate goyacc -v parser.output -o parser.go parser.y
+//go:generate goyacc -l -v parser.output -o parser.go parser.y
 
 package filter