fix some typos

Signed-off-by: teslaedison <qingchengqiushuang@gmail.com>

context.go

@@ -335,7 +335,7 @@ func (c *context) SetParamNames(names ...string) {
 
 	if len(c.pvalues) < l {
 		// Keeping the old pvalues just for backward compatibility, but it sounds that doesn't make sense to keep them,
-		// probably those values will be overriden in a Context#SetParamValues
+		// probably those values will be overridden in a Context#SetParamValues
 		newPvalues := make([]string, l)
 		copy(newPvalues, c.pvalues)
 		c.pvalues = newPvalues

echo.go

@@ -419,7 +419,7 @@ func (e *Echo) Routers() map[string]*Router {
 //
 // NOTE: In case errors happens in middleware call-chain that is returning from handler (which did not return an error).
 // When handler has already sent response (ala c.JSON()) and there is error in middleware that is returning from
-// handler. Then the error that global error handler received will be ignored because we have already "commited" the
+// handler. Then the error that global error handler received will be ignored because we have already "committed" the
 // response and status code header has been sent to the client.
 func (e *Echo) DefaultHTTPErrorHandler(err error, c Context) {
 

ip.go

@@ -64,7 +64,7 @@ XFF:  "x"                   "x, a"                  "x, a, b"
 ```
 
 In this case, use **first _untrustable_ IP reading from right**. Never use first one reading from left, as it is
-configurable by client. Here "trustable" means "you are sure the IP address belongs to your infrastructre".
+configurable by client. Here "trustable" means "you are sure the IP address belongs to your infrastructure".
 In above example, if `b` and `c` are trustable, the IP address of the client is `a` for both cases, never be `x`.
 
 In Echo, use `ExtractIPFromXFFHeader(...TrustOption)`.

middleware/request_logger_test.go

@@ -194,7 +194,7 @@ func TestRequestLogger_LogValuesFuncError(t *testing.T) {
 	e.ServeHTTP(rec, req)
 
 	// NOTE: when global error handler received error returned from middleware the status has already
-	// been written to the client and response has been "commited" therefore global error handler does not do anything
+	// been written to the client and response has been "committed" therefore global error handler does not do anything
 	// and error that bubbled up in middleware chain will not be reflected in response code.
 	assert.Equal(t, http.StatusTeapot, rec.Code)
 	assert.Equal(t, http.StatusTeapot, expect.Status)