Use encode! instead of force_encoding where applicable

Calling force_encoding doesn't actually change anything about the string,
it just changes what the string considers its encoding to be, allowing you
to end up with strings with invalid encodings. There are some invocations
in Addressable::URI where this seems intentional (followed by some g_sub'ing)
but at least at the output stage it seems like the strings should be converted
and the non-utf-8 bytes/characters removed

lib/addressable/uri.rb

@@ -552,7 +552,7 @@ def self.normalize_component(component, character_class=
       rescue ArgumentError
         encoded = self.encode_component(unencoded)
       end
-      encoded.force_encoding(Encoding::UTF_8)
+      encoded.encode!(Encoding::UTF_8, invalid: :replace, replace: "")
       return encoded
     end
 
@@ -866,7 +866,7 @@ def normalized_scheme
       end
       # All normalized values should be UTF-8
       if @normalized_scheme && @normalized_scheme.encoding != Encoding::UTF_8
-        @normalized_scheme.force_encoding(Encoding::UTF_8)
+        @normalized_scheme.encode!(Encoding::UTF_8, invalid: :replace, replace: "")
       end
       @normalized_scheme
     end
@@ -923,7 +923,7 @@ def normalized_user
       end
       # All normalized values should be UTF-8
       if @normalized_user && @normalized_user.encoding != Encoding::UTF_8
-        @normalized_user.force_encoding(Encoding::UTF_8)
+        @normalized_user.encode!(Encoding::UTF_8, invalid: :replace, replace: "")
       end
       @normalized_user
     end
@@ -982,7 +982,7 @@ def normalized_password
       end
       # All normalized values should be UTF-8
       if @normalized_password && @normalized_password.encoding != Encoding::UTF_8
-        @normalized_password.force_encoding(Encoding::UTF_8)
+        @normalized_password.encode!(Encoding::UTF_8, invalid: :replace, replace: "")
       end
       @normalized_password
     end
@@ -1052,7 +1052,7 @@ def normalized_userinfo
       end
       # All normalized values should be UTF-8
       if @normalized_userinfo && @normalized_userinfo.encoding != Encoding::UTF_8
-        @normalized_userinfo.force_encoding(Encoding::UTF_8)
+        @normalized_userinfo.encode!(Encoding::UTF_8, invalid: :replace, replace: "")
       end
       @normalized_userinfo
     end
@@ -1119,7 +1119,7 @@ def normalized_host
       end
       # All normalized values should be UTF-8
       if @normalized_host && @normalized_host.encoding != Encoding::UTF_8
-        @normalized_host.force_encoding(Encoding::UTF_8)
+        @normalized_host.encode!(Encoding::UTF_8, invalid: :replace, replace: "")
       end
       @normalized_host
     end
@@ -1239,7 +1239,7 @@ def normalized_authority
       end
       # All normalized values should be UTF-8
       if @normalized_authority && @normalized_authority.encoding != Encoding::UTF_8
-        @normalized_authority.force_encoding(Encoding::UTF_8)
+        @normalized_authority.encode!(Encoding::UTF_8, invalid: :replace, replace: "")
       end
       @normalized_authority
     end
@@ -1475,7 +1475,7 @@ def normalized_site
       end
       # All normalized values should be UTF-8
       if @normalized_site && @normalized_site.encoding != Encoding::UTF_8
-        @normalized_site.force_encoding(Encoding::UTF_8)
+        @normalized_site.encode!(Encoding::UTF_8, invalid: :replace, replace: "")
       end
       @normalized_site
     end
@@ -1540,7 +1540,7 @@ def normalized_path
       end
       # All normalized values should be UTF-8
       if @normalized_path && @normalized_path.encoding != Encoding::UTF_8
-         @normalized_path.force_encoding(Encoding::UTF_8)
+         @normalized_path.encode!(Encoding::UTF_8, invalid: :replace, replace: "")
       end
       @normalized_path
     end
@@ -1613,7 +1613,7 @@ def normalized_query(*flags)
       end
       # All normalized values should be UTF-8
       if @normalized_query && @normalized_query.encoding != Encoding::UTF_8
-        @normalized_query.force_encoding(Encoding::UTF_8)
+        @normalized_query.encode!(Encoding::UTF_8, invalid: :replace, replace: "")
       end
       @normalized_query
     end
@@ -1809,7 +1809,7 @@ def normalized_fragment
       end
       # All normalized values should be UTF-8
       if @normalized_fragment && @normalized_fragment.encoding != Encoding::UTF_8
-        @normalized_fragment.force_encoding(Encoding::UTF_8)
+        @normalized_fragment.encode!(Encoding::UTF_8, invalid: :replace, replace: "")
       end
       @normalized_fragment
     end
@@ -2337,7 +2337,7 @@ def to_s
         uri_string << self.path.to_s
         uri_string << "?#{self.query}" if self.query != nil
         uri_string << "##{self.fragment}" if self.fragment != nil
-        uri_string.force_encoding(Encoding::UTF_8)
+        uri_string.encode!(Encoding::UTF_8, invalid: :replace, replace: "")
         uri_string
       end
     end