Fix some typos (#606)

Signed-off-by: pengqiseven <i@sohu.com>
Co-authored-by: pengqiseven <i@sohu.com>

README.md

@@ -413,7 +413,7 @@ func init() {
 
 When decoding **string values without any escaped characters**, sonic references them from the origin JSON buffer instead of mallocing a new buffer to copy. This helps a lot for CPU performance but may leave the whole JSON buffer in memory as long as the decoded objects are being used. In practice, we found the extra memory introduced by referring JSON buffer is usually 20% ~ 80% of decoded objects. Once an application holds these objects for a long time (for example, cache the decoded objects for reusing), its in-use memory on the server may go up. - `Config.CopyString`/`decoder.CopyString()`: We provide the option for `Decode()` / `Unmarshal()` users to choose not to reference the JSON buffer, which may cause a decline in CPU performance to some degree.
 
-- `GetFromStringNoCopy()`: For memory safty, `sonic.Get()` / `sonic.GetFromString()` now copies return JSON. If users want to get json more quickly and not care about memory usage, you can use `GetFromStringNoCopy()` to return a JSON direclty referenced from source.
+- `GetFromStringNoCopy()`: For memory safety, `sonic.Get()` / `sonic.GetFromString()` now copies return JSON. If users want to get json more quickly and not care about memory usage, you can use `GetFromStringNoCopy()` to return a JSON directly referenced from source.
 
 ### Pass string or []byte?
 

api.go

@@ -80,7 +80,7 @@ type Config struct {
 }
 
 var (
-    // ConfigDefault is the default config of APIs, aiming at efficiency and safty.
+    // ConfigDefault is the default config of APIs, aiming at efficiency and safety.
     ConfigDefault = Config{}.Froze()
 
     // ConfigStd is the standard config of APIs, aiming at being compatible with encoding/json.
@@ -118,7 +118,7 @@ type API interface {
     NewEncoder(writer io.Writer) Encoder
     // NewDecoder create a Decoder holding reader
     NewDecoder(reader io.Reader) Decoder
-    // Valid validates the JSON-encoded bytes and reportes if it is valid
+    // Valid validates the JSON-encoded bytes and reports if it is valid
     Valid(data []byte) bool
 }
 
@@ -184,7 +184,7 @@ func UnmarshalString(buf string, val interface{}) error {
 // 
 // Notice: It expects the src json is **Well-formed** and **Immutable** when calling,
 // otherwise it may return unexpected result. 
-// Considering memory safty, the returned JSON is **Copied** from the input
+// Considering memory safety, the returned JSON is **Copied** from the input
 func Get(src []byte, path ...interface{}) (ast.Node, error) {
     return GetCopyFromString(rt.Mem2Str(src), path...)
 }

ast/visitor.go

@@ -25,7 +25,7 @@ import (
 // Visitor handles the callbacks during preorder traversal of a JSON AST.
 //
 // According to the JSON RFC8259, a JSON AST can be defined by
-// the following rules without seperator / whitespace tokens.
+// the following rules without separator / whitespace tokens.
 //
 //  JSON-AST  = value
 //  value     = false / null / true / object / array / number / string