Show value in message of name's disallowed characters check

This will make it more clear to the user which think the error message is referring to.

Author: per1234

check/checkconfigurations/checkconfigurations.go

@@ -198,7 +198,7 @@ var configurations = []Type{
 		ID:              "LP003",
 		Brief:           "disallowed characters",
 		Description:     "",
-		MessageTemplate: "disallowed characters in library.properties name field. See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format",
+		MessageTemplate: "disallowed characters in library.properties name value: {{.}}. See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format",
 		DisableModes:    nil,
 		EnableModes:     []checkmode.Type{checkmode.Default},
 		InfoModes:       nil,

check/checkfunctions/library.go

@@ -175,8 +175,13 @@ func LibraryPropertiesNameFieldDisallowedCharacters() (result checkresult.Type,
 		return checkresult.NotRun, ""
 	}
 
+	name, ok := checkdata.LibraryProperties().GetOk("name")
+	if !ok {
+		return checkresult.NotRun, "name not defined"
+	}
+
 	if schema.PropertyPatternMismatch("name", checkdata.LibraryPropertiesSchemaValidationResult()[compliancelevel.Specification], configuration.SchemasPath()) {
-		return checkresult.Fail, ""
+		return checkresult.Fail, name
 	}
 
 	return checkresult.Pass, ""