update Goiferr and doc

README.md

@@ -76,14 +76,24 @@ require("go.format").gofmt()
 require("go.format").goimport()
 ```
 
-## Auto fill struct
+## Auto fill
+
 Note: auto fill struct also supported by gopls lsp-action
 
 | command      | Description |
 | ----------- | ----------- |
 | GoFillStruct    | auto fill struct  |
 | GoFillSwitch  | fill switch|
+| GoIfErr  | Add if err|
+
+```go
+package foo
 
+import "io"
+
+func Foo() (io.Reader, error) { // the cursor on this line to add if err statement
+}
+```
 
 
 

lua/go.lua

@@ -65,7 +65,7 @@ function go.setup(cfg)
   vim.cmd([[command!          GoClearTag lua require("go.tags").clear()]])
   vim.cmd([[command!          GoCmt lua require("go.comment").gen()]])
   vim.cmd([[command!          GoRename lua require("go.rename").run()]])
-  vim.cmd([[command!          Goiferr lua require("go.iferr").run()]])
+  vim.cmd([[command!          GoIfErr lua require("go.iferr").run()]])
   vim.cmd([[command!          GoFillStruct lua require("go.reftool").fillstruct()]])
   vim.cmd([[command!          GoFillSwitch lua require("go.reftool").fillswitch()]])