* fix unhandled errors
* fix unhandled error in cache package test
* omit variable type
* omit variable type
* rename variable because collide with the imported package name
* simplify `u <= (1<<7)-1` to `u < (1 << 7)`
* It's not recommended to use `len` for empty string, we can check with string with ""
* It's not recommended to use `len` for empty string, we can check with string with ""
* It's not recommended to use `len` for empty string, we can check with string with ""
* It's not recommended to use `len` for empty string, we can check with string with ""
* Instead Bool comparison can using simplified bool check if !var = false checking
* Unnecessary use of fmt.Sprintf for value without format
* For check condition two value not required ! method
* nil check may not be enough for slice, better check with len
* function parameters combined
* When the form returns error information, the text content should not start with a capital letter or end with a punctuation mark
* error var invalidPath should have name of the form errFoo, It is recommended that the error variables that are part of an API should be named
* change to condition len(x), it's faster https://github.com/gofiber/fiber/pull/1386#discussion_r652369520
* Update write.go
* Update write_bytes.go
* Update store.go
Co-authored-by: RW <rene@gofiber.io>
