[ruby/rubygems] Change Gem::Version#approximate_recommendation to be optimistic

Previously, this used a pessimistic recommendation. This switches
it to give an optimistic recommendation.

ruby/rubygems@de24c15410

Author: jeremyevans

lib/rubygems/version.rb

@@ -325,7 +325,7 @@ def segments # :nodoc:
   end
 
   ##
-  # A recommended version for use with a ~> Requirement.
+  # A recommended version for use with a >= Requirement.
 
   def approximate_recommendation
     segments = self.segments
@@ -334,7 +334,7 @@ def approximate_recommendation
     segments.pop    while segments.size > 2
     segments.push 0 while segments.size < 2
 
-    recommendation = "~> #{segments.join(".")}"
+    recommendation = ">= #{segments.join(".")}"
     recommendation += ".a" if prerelease?
     recommendation
   end

test/rubygems/test_gem_version.rb

@@ -165,25 +165,25 @@ def test_spaceship
   end
 
   def test_approximate_recommendation
-    assert_approximate_equal "~> 1.0", "1"
+    assert_approximate_equal ">= 1.0", "1"
     assert_approximate_satisfies_itself "1"
 
-    assert_approximate_equal "~> 1.0", "1.0"
+    assert_approximate_equal ">= 1.0", "1.0"
     assert_approximate_satisfies_itself "1.0"
 
-    assert_approximate_equal "~> 1.2", "1.2"
+    assert_approximate_equal ">= 1.2", "1.2"
     assert_approximate_satisfies_itself "1.2"
 
-    assert_approximate_equal "~> 1.2", "1.2.0"
+    assert_approximate_equal ">= 1.2", "1.2.0"
     assert_approximate_satisfies_itself "1.2.0"
 
-    assert_approximate_equal "~> 1.2", "1.2.3"
+    assert_approximate_equal ">= 1.2", "1.2.3"
     assert_approximate_satisfies_itself "1.2.3"
 
-    assert_approximate_equal "~> 1.2.a", "1.2.3.a.4"
+    assert_approximate_equal ">= 1.2.a", "1.2.3.a.4"
     assert_approximate_satisfies_itself "1.2.3.a.4"
 
-    assert_approximate_equal "~> 1.9.a", "1.9.0.dev"
+    assert_approximate_equal ">= 1.9.a", "1.9.0.dev"
     assert_approximate_satisfies_itself "1.9.0.dev"
   end