Fix image height calculations. (#655)
Fix image height calculations. (#655)

Replacement characters used for images need to have the same font as its neighboring text.
marcobgoogle/nimbus,JyHu/nimbus,JyHu/nimbus,marcobgoogle/nimbus,jverkoey/nimbus,bogardon/nimbus,marcobgoogle/nimbus,Arcank/nimbus,jverkoey/nimbus,Arcank/nimbus,Arcank/nimbus,jverkoey/nimbus,bogardon/nimbus,bogardon/nimbus,Arcank/nimbus,marcobgoogle/nimbus,bogardon/nimbus,marcobgoogle/nimbus,Arcank/nimbus,JyHu/nimbus,jverkoey/nimbus,JyHu/nimbus,JyHu/nimbus,JyHu/nimbus,marcobgoogle/nimbus,bogardon/nimbus,marcobgoogle/nimbus,bogardon/nimbus,jverkoey/nimbus,Arcank/nimbus,jverkoey/nimbus,JyHu/nimbus,bogardon/nimbus,Arcank/nimbus,jverkoey/nimbus