Added missing escape characters to search separators

docs/setup/setting-up-site-search.md

@@ -102,7 +102,7 @@ The following configuration options are supported:
     ``` yaml
     plugins:
       - search:
-          separator: '[\s\-\.]' # (1)!
+          separator: '[\\s\\-\\.]' # (1)!
     ```
 
     1.  Tokenization itself is carried out by [lunr's default tokenizer], which 
@@ -186,7 +186,7 @@ documents are tokenized:
 ``` yaml
 plugins:
   - search:
-      separator: '[\s\-,:!=\[\]()"/]+|(?!\b)(?=[A-Z][a-z])|\.(?!\d)|&[lg]t;'
+      separator: "[\\s\\-,:!=\\[\\]()\"/]+|\\.(?!\\d)|&[lg]t;|(?!\\b)(?=[A-Z][a-z])"
 ```
 
 The following section explains what can be achieved with tokenizer lookahead:

docs/upgrade.md

@@ -1119,7 +1119,7 @@ was renamed to `separator`:
     ``` yaml
     plugins:
       - search:
-          separator: '[\s\-\.]+'
+          separator: '[\\s\\-\\.]+'
           lang:
             - en
             - de
@@ -1132,7 +1132,7 @@ was renamed to `separator`:
     extra:
       search:
         language: en, de, ru
-        tokenizer: '[\s\-\.]+'
+        tokenizer: '[\\s\\-\\.]+'
     ```
 
   [plugin options]: setup/setting-up-site-search.md#built-in-search-plugin