Draw lines that connect cell centers horizontally or vertically, such that each cell is connected to precisely one cell with a clue. The shape of lines connected to a clue must be like the clue in that the relative position of horizontal and vertical segments and turns must be the same, without rotations or reflections. The lengths of straight segments may vary, but must not be 0.
This example is wrong, right? The lower symbol is mirrored.
It should be fine, actually. As a curve data clue, the bottom clue is symmetric about the vertical axis.
Ouch! You are completely correct. This is a weird symbol.