[#674] Transform flavor from string to enum

- Rename nice to relaxed
- Rename original to btcr

src/config/param_variant.go

@@ -38,13 +38,13 @@ func AddVariantParam(cmd *cobra.Command) *StringParam {
 			cobraSettings: cobraSettings{
 				name:       "variant",
 				shorthand:  "r",
-				usage:      "indicate the variant to be used by TCR: nice (default) or original",
+				usage:      "indicate the variant to be used by TCR: relaxed (default) or btcr",
 				persistent: true,
 			},
 		},
 		v: paramValueString{
 			value:        "",
-			defaultValue: "nice",
+			defaultValue: "relaxed",
 		},
 	}
 	param.addToCommand(cmd)

src/config/tcr_config_test.go

@@ -244,7 +244,7 @@ func Test_show_tcr_config_with_default_values(t *testing.T) {
 		fmt.Sprintf("%v.tcr.language: %v", prefix, ""),
 		fmt.Sprintf("%v.tcr.toolchain: %v", prefix, ""),
 		fmt.Sprintf("%v.tcr.trace: %v", prefix, "none"),
-		fmt.Sprintf("%v.tcr.variant: %v", prefix, "nice"),
+		fmt.Sprintf("%v.tcr.variant: %v", prefix, "relaxed"),
 		fmt.Sprintf("%v.vcs.name: %v", prefix, "git"),
 	}
 	utils.AssertSimpleTrace(t, expected,