os: vfmt most of os, add it to v test-cleancode

vlib/os/inode.c.v

@@ -15,16 +15,16 @@ enum FileType {
 
 struct FilePermission {
 pub:
-	read bool
-	write bool
+	read    bool
+	write   bool
 	execute bool
 }
 
 struct FileMode {
 pub:
-	typ FileType
-	owner FilePermission
-	group FilePermission
+	typ    FileType
+	owner  FilePermission
+	group  FilePermission
 	others FilePermission
 }
 
@@ -32,10 +32,7 @@ pub:
 // it supports windows for regular files but it doesn't matter if you use owner, group or others when checking permissions on windows
 pub fn inode(path string) FileMode {
 	mut attr := C.stat{}
-	unsafe {
-		C.stat(charptr(path.str), &attr)
-	}
-
+	unsafe {C.stat(charptr(path.str), &attr)}
 	mut typ := FileType.regular
 	if attr.st_mode & u32(C.S_IFMT) == u32(C.S_IFDIR) {
 		typ = .directory
@@ -53,7 +50,6 @@ pub fn inode(path string) FileMode {
 			typ = .socket
 		}
 	}
-
 	$if windows {
 		return FileMode{
 			typ: typ