[DOC] Fix link

doc/_regexp.rdoc

@@ -212,7 +212,7 @@ Method Regexp.escape returns an escaped string:
 === Source Literals
 
 The source literal largely behaves like a double-quoted string;
-see {String Literals}[rdoc-ref:syntax/literals.rdoc@String+Literals].
+see {Double-Quoted String Literals}[rdoc-ref:syntax/literals.rdoc@Double-Quoted+String+Literals].
 
 In particular, a source literal may contain interpolated expressions:
 
@@ -1050,7 +1050,7 @@ Example:
   re.match('TEst') # => #<MatchData "TEst">
   re.match('TEST') # => nil
   re.match('teST') # => nil
-  
+
   re = /t(?i:e)st/
   re.match('test') # => #<MatchData "test">
   re.match('tEst') # => #<MatchData "tEst">

doc/syntax/literals.rdoc

@@ -178,7 +178,7 @@ sequences are as follows:
 The last one, <tt>\<newline></tt>, represents an empty string instead of a character.
 It is used to fold a line in a string.
 
-=== Double-quoted \String Literals
+=== Double-Quoted \String Literals
 
 The most common way of writing strings is using <tt>"</tt>:
 
@@ -213,7 +213,7 @@ See also:
 
 * {% and %Q: Interpolable String Literals}[#label-25+and+-25Q-3A+Interpolable+String+Literals]
 
-=== Single-quoted \String Literals
+=== Single-Quoted \String Literals
 
 Interpolation may be disabled by escaping the "#" character or using
 single-quoted strings: