doc: fix typo (#370)

Author: star-hengxing

README.md

@@ -21,19 +21,19 @@ The project is otherwise self-contained and it has no dependency.
 
 ## Usage
 
-Ada supports two types of URL instances, `ada:url` and `ada:url_aggregator`. The usage is
+Ada supports two types of URL instances, `ada::url` and `ada::url_aggregator`. The usage is
 the same in either case: we have an parsing function template `ada::parse` which can return
-either a result of type `ada::result<ada:url>` or of type `ada::result<ada:url_aggregator>`
-depending on your needs. The `ada:url_aggregator` class is smaller and it is backed by a precomputed
-serialized URL string. The `ada:url` class is made of several separate strings for the various
+either a result of type `ada::result<ada::url>` or of type `ada::result<ada::url_aggregator>`
+depending on your needs. The `ada::url_aggregator` class is smaller and it is backed by a precomputed
+serialized URL string. The `ada::url` class is made of several separate strings for the various
 components (path, host, and so forth).
 
 ### Parsing & Validation
 
 - Parse and validate a URL
 
 ```cpp
-ada::result<ada::url_aggregator> url = ada::parse<ada:url_aggregator>("https://www.google.com");
+ada::result<ada::url_aggregator> url = ada::parse<ada::url_aggregator>("https://www.google.com");
 if (url) { /* URL is valid */ }
 ```
 
@@ -42,14 +42,14 @@ accessing it when you are not sure that it will succeed. The following
 code is unsafe:
 
 ```cpp
-ada::result<ada:url_aggregator> url = ada::parse<ada:url_aggregator>("some bad url");
+ada::result<ada::url_aggregator> url = ada::parse<ada::url_aggregator>("some bad url");
 url->get_href();
 ```
 
 You should do...
 
 ```cpp
-ada::result<ada:url_aggregator> url = ada::parse<ada:url_aggregator>("some bad url");
+ada::result<ada::url_aggregator> url = ada::parse<ada::url_aggregator>("some bad url");
 if(url) {
   // next line is now safe:
   url->get_href();
@@ -66,7 +66,7 @@ we know that parsing succeeds.
 - Get/Update credentials
 
 ```cpp
-ada::result<ada:url_aggregator> url = ada::parse<ada:url_aggregator>("https://www.google.com");
+ada::result<ada::url_aggregator> url = ada::parse<ada::url_aggregator>("https://www.google.com");
 url->set_username("username");
 url->set_password("password");
 // ada->get_href() will return "https://username:password@www.google.com/"
@@ -75,7 +75,7 @@ url->set_password("password");
 - Get/Update Protocol
 
 ```cpp
-ada::result<ada:url_aggregator> url = ada::parse<ada:url_aggregator>("https://www.google.com");
+ada::result<ada::url_aggregator> url = ada::parse<ada::url_aggregator>("https://www.google.com");
 url->set_protocol("wss");
 // url->get_protocol() will return "wss:"
 // url->get_href() will return "wss://www.google.com/"
@@ -84,7 +84,7 @@ url->set_protocol("wss");
 - Get/Update host
 
 ```cpp
-ada::result<ada:url_aggregator> url = ada::parse<ada:url_aggregator>("https://www.google.com");
+ada::result<ada::url_aggregator> url = ada::parse<ada::url_aggregator>("https://www.google.com");
 url->set_host("github.com");
 // url->get_host() will return "github.com"
 // you can use `url.set_hostname` depending on your usage.
@@ -93,31 +93,31 @@ url->set_host("github.com");
 - Get/Update port
 
 ```cpp
-ada::result<ada:url_aggregator> url = ada::parse<ada:url_aggregator>("https://www.google.com");
+ada::result<ada::url_aggregator> url = ada::parse<ada::url_aggregator>("https://www.google.com");
 url->set_port("8080");
 // url->get_port() will return "8080"
 ```
 
 - Get/Update pathname
 
 ```cpp
-ada::result<ada:url_aggregator> url = ada::parse<ada:url_aggregator>("https://www.google.com");
+ada::result<ada::url_aggregator> url = ada::parse<ada::url_aggregator>("https://www.google.com");
 url->set_pathname("/my-super-long-path")
 // url->get_pathname() will return "/my-super-long-path"
 ```
 
 - Get/Update search/query
 
 ```cpp
-ada::result<ada:url_aggregator> url = ada::parse<ada:url_aggregator>("https://www.google.com");
+ada::result<ada::url_aggregator> url = ada::parse<ada::url_aggregator>("https://www.google.com");
 url->set_search("target=self");
 // url->get_search() will return "?target=self"
 ```
 
 - Get/Update hash/fragment
 
 ```cpp
-ada::result<ada:url_aggregator> url = ada::parse<ada:url_aggregator>("https://www.google.com");
+ada::result<ada::url_aggregator> url = ada::parse<ada::url_aggregator>("https://www.google.com");
 url->set_hash("is-this-the-real-life");
 // url->get_hash() will return "#is-this-the-real-life"
 ```