{1}rem remark and comment bug
{0}
{5}findstr{0} /c:"rem this" "file"
{5}findstr{0} /c:":: this" "file"

{1}:: SingleQuoted command string
{2}for{0} /f {6}%%A{2} in{0} ('rem this'){2} do echo{0} {6}%%A{0}

{1}:: DoubleQuoted string
{2}for{0} /f {6}%%A{2} in{0} ("rem this"){2} do echo{0} {6}%%A{0}

{1}:: BackQuote command string
{2}for{0} /f "usebackq" {6}%%A{2} in{0} (`rem this`){2} do echo{0} {6}%%A{0}