Use ~~~kdl instead of `` for strings with significant whitespace.

That compiles to <sourcecode> which preserves sequences of spaces.

draft-marchan-kdl2.md

@@ -446,8 +446,19 @@ interpreted as described in the following table:
 
 In addition to escaping individual characters, `\` can also escape whitespace.
 When a `\` is followed by one or more literal whitespace characters, the `\`
-and all of that whitespace are discarded. For example, `"Hello World"` and
-`"Hello \    World"` are semantically identical. See whitespace ({{whitespace}})
+and all of that whitespace are discarded. For example,
+
+~~~kdl
+"Hello World"
+~~~
+
+and
+
+~~~kdl
+"Hello \    World"
+~~~
+
+are semantically identical. See whitespace ({{whitespace}})
 and [newlines](#newline) for how whitespace is defined.
 
 Note that only literal whitespace is escaped; whitespace escapes (`\n` and
@@ -550,7 +561,12 @@ This is the base indentation
         bar
 ~~~
 
-which is equivalent to `"    foo\nThis is the base indentation\n        bar"`
+which is equivalent to
+
+~~~kdl
+"    foo\nThis is the base indentation\n        bar"
+~~~
+
 when written as a single-line string.
 
 #### Shorter last-line indent
@@ -574,7 +590,11 @@ This example's string value will be:
           bar
 ~~~
 
-Equivalent to `"      foo\n  This is no longer on the left edge\n          bar"`.
+Equivalent to
+
+~~~kdl
+"      foo\n  This is no longer on the left edge\n          bar"
+~~~
 
 #### Empty lines
 
@@ -596,7 +616,11 @@ Indented a bit.
 A second indented paragraph.
 ~~~
 
-Equivalent to `"Indented a bit.\n\nA second indented paragraph."`
+Equivalent to
+
+~~~kdl
+"Indented a bit.\n\nA second indented paragraph."
+~~~
 
 #### Syntax errors
 
@@ -719,7 +743,13 @@ Here's a """
 without escapes.
 ~~~
 
-or equivalently, `"Here's a \"\"\"\n    multiline string\n    \"\"\"\nwithout escapes."` as a Quoted String.
+or equivalently,
+
+~~~kdl
+"Here's a \"\"\"\n    multiline string\n    \"\"\"\nwithout escapes."
+~~~
+
+as a Quoted String.
 
 ## Number