code-gen: syntax-aware generation of vendor regex

internal/code-generator/assets/vendor.go.tmpl

@@ -3,8 +3,12 @@ package data
 import "github.com/go-enry/go-enry/v2/regex"
 
 var VendorMatchers = []regex.EnryRegexp{
-	{{range $regexp := . -}}
-	regex.MustCompile(`{{ $regexp }}`),
+	{{range $re := . -}}
+	{{ if isRE2 $re  -}}
+		regex.MustCompile({{ $re | stringVal }}),
+	{{- else -}}
+		regex.MustCompileRuby({{ $re | stringVal }}),
+	{{ end }}
 	{{end -}}
 }