* If pixelformat==PF_HPCR:
*
* HP Color Recovery dithering (ad@lms.be 30/08/95)
- * HP has on it's 8-bit 700-series computers, a feature called
+ * HP has on its 8-bit 700-series computers, a feature called
* 'Color Recovery'. This allows near 24-bit output (so they say).
* It is enabled by selecting the 8-bit TrueColor visual AND
* corresponding colormap (see tkInitWindow) AND doing some special