Suggest manifest for --features help

Suggested by ehuss

Author: pickfire

src/cargo/util/command_prelude.rs

@@ -309,7 +309,7 @@ pub trait ArgMatchesExt {
                     bail!(
                         "--{} is not allowed in the root of a virtual workspace\n\
                          note: while this was previously accepted, it didn't actually do anything\n\
-                         help: try cd into the package and run cargo command",
+                         help: change the current directory to the package directory, or use the --manifest-path flag to the path of the package",
                         flag
                     );
                 }

tests/testsuite/package_features.rs

@@ -57,7 +57,7 @@ fn virtual_no_default_features() {
             "\
 [ERROR] --no-default-features is not allowed in the root of a virtual workspace
 [NOTE] while this was previously accepted, it didn't actually do anything
-[HELP] try cd into the package and run cargo command
+[HELP] change the current directory to the package directory, or use the --manifest-path flag to the path of the package
 ",
         )
         .run();
@@ -126,7 +126,7 @@ fn virtual_features() {
             "\
 [ERROR] --features is not allowed in the root of a virtual workspace
 [NOTE] while this was previously accepted, it didn't actually do anything
-[HELP] try cd into the package and run cargo command
+[HELP] change the current directory to the package directory, or use the --manifest-path flag to the path of the package
 ",
         )
         .run();
@@ -204,7 +204,7 @@ fn virtual_with_specific() {
             "\
 [ERROR] --features is not allowed in the root of a virtual workspace
 [NOTE] while this was previously accepted, it didn't actually do anything
-[HELP] try cd into the package and run cargo command
+[HELP] change the current directory to the package directory, or use the --manifest-path flag to the path of the package
 ",
         )
         .run();
@@ -374,7 +374,7 @@ fn virtual_member_slash() {
             "\
 [ERROR] --features is not allowed in the root of a virtual workspace
 [NOTE] while this was previously accepted, it didn't actually do anything
-[HELP] try cd into the package and run cargo command
+[HELP] change the current directory to the package directory, or use the --manifest-path flag to the path of the package
 ",
         )
         .run();