Update README.md

Author: chrisrowe

README.md

@@ -39,12 +39,12 @@ The plugin generates the following sets of classes:
 
 - `.grid` for setting `display: grid` on an element
 - `.grid-columns-{size}` for specifying the number of columns in the grid
-- `.col-span-{columns}` for specifying how wide a cell should be
+- `.col-span-{columns}` for specifying how many columns a cell should span
 - `.grid-gap-{size}` for specifying the size of the gap between columns/rows
 - `.grid-automin-{size}` for applying the minimum width of the columns using auto-fit and minmax (the max is 1fr)
-- `.col-start-{line}` and `.col-end-{line}` for specifying a cell's start and end points explicitly (useful for reordering cells or leaving gaps)
-- `.row-span-{columns}` for specifying how tall a cell should be
-- `.row-start-{line}` and `.row-end-{line}`, for specifying a cell's start and end points explicitly (useful for reordering cells or leaving gaps)
+- `.col-start-{line}` and `.col-end-{line}` for specifying a cell's start and end grid lines explicitly (useful for reordering cells or leaving gaps)
+- `.row-span-{columns}` for specifying how many rows a cell should span
+- `.row-start-{line}` and `.row-end-{line}`, for specifying a cell's start and end grid lines explicitly (useful for reordering cells or leaving gaps)
 - `.grid-dense` applies `grid-auto-flow: dense`
 
 It's not really practical to expose all of the power of CSS Grid through utilities, but this plugin is a good example of using CSS Grid to replace a cell-only float or Flexbox grid.