access modifiers: update tests/examples

vlib/compiler/tests/struct_test.v

@@ -154,6 +154,19 @@ fn test_assoc_with_constants() {
 	assert again.b == 22
 }
 
+struct AttrTest{
+	a int     // private immutable (default)
+mut:
+	b int     // private mutable
+	c int     // (you can list multiple fields with the same access modifier)
+pub:
+	d int     // public immmutable (readonly)
+pub mut:
+	e int     // public, but mutable only in parent module
+//__global:
+	f int 	  // public and mutable both inside and outside parent module
+}
+
 /*
 [typedef]
 struct C.fixed {

vlib/encoding/csv/reader.v

@@ -21,8 +21,7 @@ struct Reader  {
 	// has_header        bool
 	// headings          []string
 	data              string
-pub:
+pub mut:
-mut:
 	delimiter         byte
 	comment           byte
 	is_mac_pre_osx_le bool

vlib/log/log.v

@@ -44,10 +44,9 @@ pub struct Log {
 mut:
 	level LogLevel
 	output_label string
-
 	ofile os.File
 	output_to_file bool
-pub:
+pub mut:
 	output_file_name string
 }
 

vlib/net/urllib/urllib.v

@@ -321,7 +321,7 @@ fn escape(s string, mode EncodingMode) string {
 // URL's String method uses the escaped_path method to obtain the path. See the
 // escaped_path method for more details.
 pub struct URL {
-pub: mut:
+pub mut:
 	scheme      string
 	opaque      string    // encoded opaque data
 	user        &Userinfo // username and password information

vlib/net/urllib/values.v

@@ -5,14 +5,12 @@
 module urllib
 
 struct Value {
-pub:
+pub mut:
-mut:
 	data []string
 }
 
 struct Values {
-pub:
+pub mut:
-mut:
 	data map[string]Value
 	size int
 }