✨ Add separator option

options.go

@@ -9,21 +9,21 @@ type Option func(c *Config)
 // This will be included in the generated name after the generated string and before the suffix.
 func WithOriginal(o string) Option {
 	return func(c *Config) {
-		c.original = "_" + o
+		c.original = o
 	}
 }
 
 // WithPrefix sets a prefix for the generated name.
 func WithPrefix(p string) Option {
 	return func(c *Config) {
-		c.prefix = p + "_"
+		c.prefix = p
 	}
 }
 
 // WithSuffix sets a suffix for the generated name. It will be included in the base name before the suffix.
 func WithSuffix(s string) Option {
 	return func(c *Config) {
-		c.suffix = "_" + s
+		c.suffix = s
 	}
 }
 
@@ -40,3 +40,10 @@ func WithExtension(ext string) Option {
 		c.extension = "." + strings.TrimPrefix(ext, ".")
 	}
 }
+
+// WithSeparator sets the separator for the generated filename.
+func WithSeparator(sep string) Option {
+	return func(c *Config) {
+		c.separator = sep
+	}
+}