Apply typo fixes from code review

Co-authored-by: Romain Francois <[email protected]>

website/docs/plugins/pixel-perfect-rendering/index.md

@@ -43,11 +43,11 @@ function centreOffset(lineBitmapWidth: number): number {
 
 /**
  * Calculates the bitmap position for an item with a desired length (height or width), and centred according to
- * an position coordinate defined in media sizing.
+ * a position coordinate defined in media sizing.
  * @param positionMedia - position coordinate for the bar (in media coordinates)
  * @param pixelRatio - pixel ratio. Either horizontal for x positions, or vertical for y positions
  * @param desiredWidthMedia - desired width (in media coordinates)
- * @returns Position of of the start point and length dimension.
+ * @returns Position of the start point and length dimension.
  */
 export function positionsLine(
     positionMedia: number,
@@ -75,7 +75,7 @@ If you need to draw a shape between two coordinates (for example, y coordinates
  * @param position1Media - media coordinate for the first point
  * @param position2Media - media coordinate for the second point
  * @param pixelRatio - pixel ratio for the corresponding axis (vertical or horizontal)
- * @returns Position of of the start point and length dimension.
+ * @returns Position of the start point and length dimension.
  */
 export function positionsBox(
     position1Media: number,
@@ -91,7 +91,7 @@ export function positionsBox(
 }
 ```
 
-## Defaults Widths
+## Default Widths
 
 Please refer to the following pages for functions defining the default widths of shapes drawn by the library: