Fix typo in 'Reboot' section

Changed `box-sizing: border` to `box-sizing: border-box`

diff --git a/docs/migration.md b/docs/migration.md
index 21217ab70b948a22f5e17f067bd69eeeeba9dc5f..61a1d6c18ac79c6aea212594d733a647738680eb 100644 (file)
--- a/docs/migration.md
+++ b/docs/migration.md
@@ -59,7 +59,7 @@ This list highlights key changes by component between v3.x.x and v4.0.0.
 
 ### Reboot
 
-New to Bootstrap 4 is the Reboot, a new stylesheet that builds on Normalize with our own somewhat opinionated reset styles. Selectors appearing in this file only use elements—there are no classes here. This isolates our reset styles from our component styles for a more modular approach. Some of the most important resets this includes are the `box-sizing: border` change, moving from `rem` to `em` units on many elements, link styles, and many form element resets.
+New to Bootstrap 4 is the Reboot, a new stylesheet that builds on Normalize with our own somewhat opinionated reset styles. Selectors appearing in this file only use elements—there are no classes here. This isolates our reset styles from our component styles for a more modular approach. Some of the most important resets this includes are the `box-sizing: border-box` change, moving from `rem` to `em` units on many elements, link styles, and many form element resets.
 
 ### Typography