rails/rails — pull request #4538 by kennyj (2012-01-19 12:04:55+00:00)
Title: Convert URI.parser.parse to URI.parse, and remove ruby 1.8.x code.

I had mistaken related to GH #4521.

URI.unescape and URI.escape are deprecated since 1.9.2.

Therefore it seems that we use URI.parser method to use URI.parser.unescape,
and I think that we shouldn't remove URI.parser method (core_ext).

And I seen the below line in railties/guides/source/3_0_release_notes.textile.

```
Ruby 1.9.2: URI.parse and .decode are deprecated and are no longer used in the library.
```

But I think that the above one has an incorrect fact (URI.parse is not deprecated).
Therefore I converted URI.parser.parse to URI.parse for consistency.

/cc @josevalim