In Visual Studio 2013, what does this black arrow-shaped character mean in the line of a breakpoint?

Question

Somehow one of the lines in my source code was marked with a black arrow icon pointing to the right. I am familiar with bookmarks and breakpoints, but I cannot find the key to this. This is the topmost icon in the screenshot below.

What is the purpose of this symbol?

Answer 1

This icon indicates that the line is the result of the search the last time you did "Find Files".