Go-optview takes the output of gc -m (compiler's optimization
decissions) and presents it side-by-side with the source code.

Use:

	go-optview [flags] [packages]

Flags:

	-V: print version and exit
	-c: clean existing optimization messages from source
	-prefix: prefix for optimization messages, default "//←"
	-w: write result to source files instead of stdout

Usage examples:

Write optimization messages back to source files:

	go-optview -w
(current directory)
or:
	go-optview -w mypackage

Clean source files:

	go-optview -w -c

Write optimization messages to stdout:

	go-optview 

Example output:

	func MakeSlice(N int) Slice { //←[ can inline MakeSlice]
		return make(Slice, N) //←[ make(Slice, N) escapes to heap]
	}
	func (s Slice) N() int { //←[ can inline Slice.N  Slice.N s does not escape]
		return len(s)
	}