Improve code listing style

- Bigger font for print version code listings.
- More compact line height for print + online code listings.

Resolves #1595

Author: hollasch

CHANGELOG.md

@@ -2,13 +2,15 @@ Change Log / Ray Tracing in One Weekend
 ====================================================================================================
 
 # v4.0.1 (in progress)
-
-### Common
   - Delete --
   - Change --
   - Fix    --
   - New    --
 
+### Common
+  - Fix    -- Big improvement to print version listing font size (#1595) and more compact line
+              height for code listings in both print and browser.
+
 ### In One Weekend
   - Fix    -- Fixed usage of the term "unit cube" for a cube of diameter two (#1555)
 

style/book.css

@@ -88,6 +88,7 @@ div.indented {
     min-width: 96%;
     width: fit-content;
     background: #e4e4e0;
+    line-height: 1em;
 }
 
 .md code {
@@ -241,6 +242,6 @@ div.credit-list ul {
     }
 
     .md pre.listing.tilde code {
-        font-size: 65%;
+        font-size: 85%;
     }
 }