Update multiline string examples and formatting adjustments

Author: antonmedv

spec/v0.1.md

@@ -91,8 +91,8 @@ Commas are optional. Trailing comma is allowed.
 
 ```maml
 {
-  key: "value",
-  "quotted key": "value",
+  foo: "value",
+  bar: "value",
 }
 ```
 
@@ -166,7 +166,7 @@ the lazy dog.
 }
 ```
 
-In the previous example, a string ends with a newline at the end.
+In the previous example, a string ends with a newline at the end:
 
 ```maml
 "The quick brown\nfox jumps over\nthe lazy dog.\n"
@@ -181,13 +181,23 @@ fox jumps over
 the lazy dog."""
 ```
 
-You can write one or two quotes anywhere within a multiline string,
-but sequences of three or more quotes are not permitted.
+All whitespaces are preserved as is.
 
 ```maml
-"""
-Maximum of two "" quotes allowed inside.
-"""
+{
+  key: """
+    Roses are red,
+    Violets are blue;
+  """
+}
+```
+
+The previous example can be written as:
+
+```maml
+{
+  key: "    Roses are red,\n    Violets are blue;\n  "
+}
 ```
 
 All escape sequences are preserved as is.
@@ -199,6 +209,16 @@ are interpreted as-is without modification.
 """
 ```
 
+You can write one or two quotes anywhere within a multiline string,
+but sequences of three or more quotes are not permitted.
+
+```maml
+"""
+Maximum of two "" quotes allowed inside.
+But many if spaces: "1", "2", "3".
+"""
+```
+
 Multiline string may also be written in a single line.
 
 ```maml