In Visual Studio 2013, what does this black arrow-shaped symbol in the breakpoint bar mean? [duplicate]

Question

Somehow, one of the lines in my source code became marked with a black arrow-shaped icon pointing to the right. I'm familiar with bookmarks and breakpoints, but I can't find a clue about this one. It is the top-most icon in the screenshot below.

What is the purpose of this symbol?

Answer 1

That icon indicates that the line is a Find Result from the last time you did a "Find In Files."