Reflows and rephrases

doc/Language/syntax.pod6

@@ -609,7 +609,9 @@ see L<Int|/type/Int>.
 
 =head4 Rat literals
 
-L<Rat|/type/Rat> literals (rationals) are very common, and take the place of decimals or floats in many other languages. Integer division also results in a C<Rat>.
+L<Rat|/type/Rat> literals (rationals) are very common, and take the
+place of decimals or floats in many other languages. Integer division
+also results in a C<Rat>.
 
     =begin code :skip-test
     1.0
@@ -651,13 +653,15 @@ constructing them: C<< key => 'value' >> and C<:key('value')>.
 
 =head4 Arrow pairs
 
-Arrow pairs can have an expression or an identifier on the left-hand side:
+Arrow pairs can have an expression, a string literal or a "bare
+identifier", which is a string with ordinary-identifier syntax that does
+not need quotes on the left-hand side:
 
-    =begin code :skip-test
-    identifier => 42
-    "identifier" => 42
-    ('a' ~ 'b') => 1
-    =end code
+=begin code :skip-test
+like-an-identifier-ain't-it => 42
+"key" => 42
+('a' ~ 'b') => 1
+=end code
 
 =head4 Adverbial pairs (colon pairs)