minor formatting changes

Author: josepham7

source/index.md.erb

@@ -12209,11 +12209,11 @@ htmlContent | string | HTML snippet to render Report
 
      |     |     |
 -----|-----|-----|
-privateId | string | the image private ID
-height | integer | original height of the image in pixels
-width | integer | original width of the image in pixels
-fileName | string | name of the image file
-format | string | [FormatDescriptor]
+**privateId** | string | The image private ID
+**height** | integer | Original height of the image in pixels
+**width** | integer | Original width of the image in pixels
+**fileName** | string | Name of the image file
+**format** | string | [formatDescriptor](#formatting)
 
 
 ### CellDataItem object