Improve rule messages

Author: per1234

internal/rule/ruleconfiguration/ruleconfiguration.go

@@ -207,7 +207,7 @@ var configurations = []Type{
 		Category:         "structure",
 		Subcategory:      "source code",
 		ID:               "LS010",
-		Brief:            "recursive w/ utility folder",
+		Brief:            "recursive with utility folder",
 		Description:      "",
 		MessageTemplate:  `Utility folder found in "1.5" format library. Compilation of this folder is only supported on "1.0" format libraries. See: https://arduino.github.io/arduino-cli/latest/library-specification/#source-code`,
 		DisableModes:     nil,
@@ -432,7 +432,7 @@ var configurations = []Type{
 		Subcategory:      "name field",
 		ID:               "LP012",
 		Brief:            `name starts with "Arduino"`,
-		Description:      `Case insensitive. 3rd party libraries added to Library Manager index prior to the enactment of this rule are "grandfathered".`,
+		Description:      `Case insensitive. Only 3rd party libraries added to the Library Manager index prior to the enactment of this rule are allowed to have this name prefix.`,
 		MessageTemplate:  `Library name {{.}} starts with "Arduino". These names are reserved for official libraries.`,
 		DisableModes:     []rulemode.Type{rulemode.Official},
 		EnableModes:      []rulemode.Type{rulemode.Default},