Fix typos (#3527)

main/commands/base/env.go

@@ -7,7 +7,7 @@ import (
 
 // CommandEnvHolder is a struct holds the environment info of commands
 type CommandEnvHolder struct {
-	// Excutable name of current binary
+	// Executable name of current binary
 	Exec string
 	// commands column width of current command
 	CommandsWidth int