Copy edit minimum access level option help

Author: mattt

Sources/swift-doc/Subcommands/Coverage.swift

@@ -14,7 +14,7 @@ extension SwiftDoc {
             var output: String?
 
             @Option(name: .long,
-                    help: "The minimum access level of the symbols which should be included.")
+                    help: "The minimum access level of the symbols considered for coverage statistics.")
             var minimumAccessLevel: AccessLevel = .public
         }
 

Sources/swift-doc/Subcommands/Generate.swift

@@ -37,7 +37,7 @@ extension SwiftDoc {
       var baseURL: String = "/"
 
       @Option(name: .long,
-              help: "The minimum access level of the symbols which should be included.")
+              help: "The minimum access level of the symbols included in generated documentation.")
       var minimumAccessLevel: AccessLevel = .public
     }