message: more cargo install usage adaptations in the same tests
diff: @@ -747,7 +747,7 @@ fn install_default_features() {
  assert_that(p.cargo("uninstall").arg("foo"), execs().with_status(0));
  assert_that(
  - p.cargo("install").arg("--no-default-features"),
  + p.cargo("install --path .").arg("--no-default-features"),
  execs().with_status(101).with_stderr(format!(
  "\
  [INSTALLING] foo v0.0.1 ([..])
  @@ -758,12 +758,12 @@ fn install_default_features() {
  );
  assert_that(cargo_home(), is_not(has_installed_exe("foo")));
  - assert_that(p.cargo("install").arg("--bin=foo"), execs().with_status(0));
  + assert_that(p.cargo("install --path .").arg("--bin=foo"), execs().with_status(0));
  assert_that(cargo_home(), has_installed_exe("foo"));
  assert_that(p.cargo("uninstall").arg("foo"), execs().with_status(0));
  assert_that(
  - p.cargo("install")
  + p.cargo("install --path .")
  .arg("--bin=foo")
  .arg("--no-default-features"),
  execs().with_status(101).with_stderr(format!(
  @@ -781,14 +781,14 @@ Consider enabling them by passing e.g. `--features=\"a\"`
  assert_that(cargo_home(), is_not(has_installed_exe("foo")));
  assert_that(
  - p.cargo("install").arg("--example=foo"),
  + p.cargo("install --path .").arg("--example=foo"),
  execs().with_status(0),
  );
  assert_that(cargo_home(), has_installed_exe("foo"));
  assert_that(p.cargo("uninstall").arg("foo"), execs().with_status(0));
  assert_that(
  - p.cargo("install")
  + p.cargo("install --path .")
  .arg("--example=foo")
  .arg("--no-default-features"),
  execs().with_status(101).with_stderr(format!(
  @@ -874,7 +874,7 @@ fn install_multiple_required_features() {
  assert_that(p.cargo("uninstall").arg("foo"), execs().with_status(0));
  assert_that(
  - p.cargo("install").arg("--features").arg("c"),
  + p.cargo("install --path .").arg("--features").arg("c"),
  execs().with_status(0),
  );
  assert_that(cargo_home(), has_installed_exe("foo_1"));
  @@ -882,7 +882,7 @@ fn install_multiple_required_features() {
  assert_that(p.cargo("uninstall").arg("foo"), execs().with_status(0));
  assert_that(
  - p.cargo("install").arg("--no-default-features"),
  + p.cargo("install --path .").arg("--no-default-features"),
  execs().with_status(101).with_stderr(
  "\
  [INSTALLING] foo v0.0.1 ([..])
  