rust-hosted-langs
diff --git a/‎.github/workflows/book.yml‎
Lines changed: 2 additions & 2 deletions b/‎.github/workflows/book.yml‎
Lines changed: 2 additions & 2 deletions
diff --git a/‎booksrc/chapter-alignment.md‎
Lines changed: 4 additions & 1 deletion b/‎booksrc/chapter-alignment.md‎
Lines changed: 4 additions & 1 deletion
@@ -4,14 +4,14 @@ on: [push]
 
 jobs:
   deploy:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
 
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v1
         with:
-          mdbook-version: '0.3.7'
+          mdbook-version: '0.4.5'
           # mdbook-version: 'latest'
 
       - run: mdbook build
 
@@ -26,7 +26,10 @@ aligned to 16 byte boundaries for optimal code generation and performance.
 Unaligned loads and stores may be allowed but normally these incur
 performance penalties.
 
-While Intel allows unaligned access, the
+![Common alignments](img/alignment.png)
+
+While Intel allows unaligned access (that is, alignment on any byte boundary),
+the
 [recommended](https://software.intel.com/sites/default/files/managed/9e/bc/64-ia-32-architectures-optimization-manual.pdf?wapkw=248966)
 (see section 3.6.4) alignment for objects larger than 64 bits is to 16 byte
 boundaries.