Added credit to previous author.

Kelvin Lau · Kelvin Lau · commit 4cc91449780d · 2016-09-20T14:02:16.000-07:00
diff --git a/Red-Black Tree/README.markdown b/Red-Black Tree/README.markdown
@@ -116,4 +116,4 @@ We now have to go through a lot of steps in order to remove this doubleBlack col
 
 Important to note is that GeeksforGeeks doesn't mention a few deletion cases that do occur. The code however does implement these.
 
-*Written for Swift Algorithm Club by Jaap Wijnen*
+*Written for Swift Algorithm Club by Jaap Wijnen. Updated from Ashwin Raghuraman's contribution.*

Original file line number	Diff line number	Diff line change
`@@ -116,4 +116,4 @@ We now have to go through a lot of steps in order to remove this doubleBlack col`
`116`	`116`
`117`	`117`	`Important to note is that GeeksforGeeks doesn't mention a few deletion cases that do occur. The code however does implement these.`
`118`	`118`
`119`		`-Written for Swift Algorithm Club by Jaap Wijnen`
	`119`	`+Written for Swift Algorithm Club by Jaap Wijnen. Updated from Ashwin Raghuraman's contribution.`