extensions/git/src/git.ts/GitError/toString
class GitError:	toString(): string {
		let result = this.message + ' ' + JSON.stringify({
			exitCode: this.exitCode,
			gitErrorCode: this.gitErrorCode,
			gitCommand: this.gitCommand,
			stdout: this.stdout,
			stderr: this.stderr
		}, null, 2);

		if (this.error) {
			result += (<any>this.error).stack;
		}

		return result;
	}