Fix warning message about bundler versionfix_upgrade_instructions

To actually make the warning go away, we need to recommend exactly
installing the locked version. Otherwise the latest version gets
installed, but not used to being a different major than the one locked,
so the warning stays.

3 files changed, 9 insertions, 5 deletions

diff --git a/lib/bundler/lockfile_parser.rb b/lib/bundler/lockfile_parser.rb
index a7d4dc56b7..cd42919da2 100644
--- a/lib/bundler/lockfile_parser.rb
+++ b/lib/bundler/lockfile_parser.rb
@@ -107,9 +107,9 @@ module Bundler
       when 0
         if current_version < bundler_version
           Bundler.ui.warn "Warning: the running version of Bundler (#{current_version}) is older " \
-               "than the version that created the lockfile (#{bundler_version}). We suggest you " \
-               "upgrade to the latest version of Bundler by running `gem " \
-               "install bundler#{prerelease_text}`.\n"
+               "than the version that created the lockfile (#{bundler_version}). We suggest you to " \
+               "upgrade to the version that created the lockfile by running `gem install " \
+               "bundler:#{bundler_version}#{prerelease_text}`.\n"
         end
       end
     end
diff --git a/spec/lock/lockfile_bundler_1_spec.rb b/spec/lock/lockfile_bundler_1_spec.rb
index 0e89645503..625068de38 100644
--- a/spec/lock/lockfile_bundler_1_spec.rb
+++ b/spec/lock/lockfile_bundler_1_spec.rb
@@ -180,7 +180,9 @@ RSpec.describe "the lockfile format", :bundler => "< 2" do
     end
 
     warning_message = "the running version of Bundler (9999999.0.0) is older " \
-                      "than the version that created the lockfile (9999999.1.0)"
+                      "than the version that created the lockfile (9999999.1.0). " \
+                      "We suggest you to upgrade to the version that created the " \
+                      "lockfile by running `gem install bundler:9999999.1.0`."
     expect(last_command.stderr.scan(warning_message).size).to eq(1)
 
     lockfile_should_be <<-G
diff --git a/spec/lock/lockfile_spec.rb b/spec/lock/lockfile_spec.rb
index a77ce83f9f..3ec079ac65 100644
--- a/spec/lock/lockfile_spec.rb
+++ b/spec/lock/lockfile_spec.rb
@@ -180,7 +180,9 @@ RSpec.describe "the lockfile format", :bundler => "2" do
     end
 
     warning_message = "the running version of Bundler (9999999.0.0) is older " \
-                      "than the version that created the lockfile (9999999.1.0)"
+                      "than the version that created the lockfile (9999999.1.0). " \
+                      "We suggest you to upgrade to the version that created the " \
+                      "lockfile by running `gem install bundler:9999999.1.0`."
     expect(last_command.bundler_err).to include warning_message
 
     lockfile_should_be <<-G