Add "slack" width constraint modes

tests/dummy/app/pods/docs/guides/header/size-constraints/template.md

@@ -1,20 +1,20 @@
 # Size Constraints
 
 You can set the `widthConstraint` property on your table to ensure that it never
-grows too big or too small. There are 4 possible settings:
+grows too big or too small. There are six possible settings:
 
 1. `eq-container`: Ensures that the table is always exactly the width the of its
 container.
 
-2. `eq-container-slack`: Similar to `eq-container`, but allocates excess whitespace to an empty slack column on the right side of the table.
+2. `eq-container-slack`: Similar to `eq-container`, but allocates excess whitespace to an empty "slack" column on the right side of the table.
 
 3. `gte-container`: Ensures that the table is always the same width or larger than its container.
 
-4. `eq-container-slack`: Similar to `gte-container`, but allocates excess whitespace to an empty slack column on the right side of the table.
+4. `eq-container-slack`: Similar to `gte-container`, but allocates excess whitespace to an empty "slack" column on the right side of the table.
 
 5. `lte-container`: Ensures that the table is never larger than its container.
 
-4. `none`: The default, does not enforce any size constraint.
+6. `none`: The default, does not enforce any size constraint.
 
 The table will react to resizing its container automatically. Sizing will _not_
 override the min/max widths provided by columns.