The DirtyGutter plugin marks dirty lines (lines modified since last save) in the Gutter area. The dirty line information is provided by a so-called "Dirty
line provider", which is an extensible service. Two built-in providers are included:
"Simple" - marks any modified lines with a colored marker by tracking
"Diff" - uses a "diff" algorithm to calculate dirty lines for each multi-line content change. Uses a simple algorithm for marking single-line changes.
Marks the changes according to their types