CONTRIBUTING.md: removed reference to LUCENE TO-DO and deleted the on…

…e remaining LUCENE TO-DO after reviewing it

CONTRIBUTING.md

@@ -1,4 +1,4 @@
-# Lucene.NET Contributor's Guide
+# Lucene.NET Contributor's Guide
 
 Have you found a bug or do you have an idea for a cool new enhancement? Contributing code is a great way to give something back to the open-source community. Before you dig right into the code there are a few guidelines that we need contributors to follow so that we can have a chance of keeping on top of things.
 
@@ -26,7 +26,7 @@ There are several [**Open Issues on GitHub**](https://github.com/apache/lucenene
 * Helping update the API, or at least just providing feedback on which API changes are affecting the usability. There are several things on our radar, like integrating something like [Lucene.Net.Linq](https://github.com/themotleyfool/Lucene.Net.Linq) directly into our project, [converting the remaining public-facing iterator classes into `IEnumerator<T>`](https://issues.apache.org/jira/projects/LUCENENET/issues/LUCENENET-469?filter=allopenissues) so they can be used with foreach loops, adding extension methods to remove the need for casting, etc.
 * Making demos and tutorials, blogging about Lucene.Net, etc. (and providing feedback on how we can make the API better!). If you write a helpful Lucene.Net post on your blog, be sure to let us know so we can link to it.
 * Helping out with documentation. We are still trying to make the API docs easily navigable (see #206), and there are many files that are not formatted correctly (links not appearing, tables not very readable, etc). Also, we need help getting all of the Java-related documentation converted to use .NET methodologies.
-* Fixing TODOs. There are several TODOs throughout the code that need to be reviewed and action taken, if necessary. Search for `LUCENENET TODO|LUCENE TO-DO` using the regular expression option in Visual Studio to find them. Do note there are a lot of TODOs left over from Java Lucene that are safe to ignore.
+* Fixing TODOs. There are several TODOs throughout the code that need to be reviewed and action taken, if necessary. Search for `LUCENENET TODO` using the regular expression option in Visual Studio to find them. Do note there are a lot of TODOs left over from Java Lucene that are safe to ignore.
 * Reviewing code. Pick a random section, review line by line, comparing the code against the [original Lucene 4.8.0 code](https://github.com/apache/lucene-solr/tree/releases/lucene-solr/4.8.0/lucene). Many of the bugs have been found this way, as the tests are not showing them. Let us know if you find anything suspicious on the [dev mailing list](https://cwiki.apache.org/confluence/display/LUCENENET/Mailing+Lists) or [submit a pull request](https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/creating-a-pull-request) with a fix.
 * Creating projects to make Lucene.Net easier to use with various .NET frameworks (ASP.NET MVC, WebApi, AspNetCore, WPF, EntityFramework, etc). In general, we would like common tasks as easy as possible to integrate into applications build on these frameworks without everyone having to write the same boilerplate code.
 * Building automation tools to eliminate some of the manual work of managing the project, updating information on various web pages, creating tools to make porting/upgrading more automated, etc.
@@ -35,4 +35,4 @@ Or, if none of that interests you, join our [dev mailing list](https://cwiki.apa
 
 ## Thank You For Your Help!
 
-Again, thank you very much for your contribution. May the fork be with you!
+Again, thank you very much for your contribution. May the fork be with you!

src/Lucene.Net/Util/CharsRef.cs

@@ -362,7 +362,7 @@ public virtual int Compare(CharsRef a, CharsRef b)
 
                         /* aChar != bChar, fix up each one if they're both in or above the surrogate range, then compare them */
                         if (aChar >= 0xd800 && bChar >= 0xd800)
-                        {//LUCENE TO-DO possible truncation or is char 16bit?
+                        {
                             if (aChar >= 0xe000)
                             {
                                 aChar -= (char)0x800;