pinch, pluck, pick off, pull off, tweek, tweague, twinge, tweag, twitch, twerk, more...

fix, adjust, settle

bug fix, feature addition, performance tweak, cosmetic tweak, security tweak, more...

little, final, sharp, playful, small, minor, slight, simple, last, wholesome, quick

adjust just a bit,   tiny change,   slight strain,   small improvement,   modify slightly,   adjust slightly