all: replace "NB:" with "Note:" (docs/comments)

vlib/strings/builder.c.v

@@ -79,7 +79,7 @@ pub fn (mut b Builder) drain_builder(mut other Builder, other_new_cap int) {
 }
 
 // byte_at returns a byte, located at a given index `i`.
-// NB: it can panic, if there are not enough bytes in the strings builder yet.
+// Note: it can panic, if there are not enough bytes in the strings builder yet.
 [inline]
 pub fn (b &Builder) byte_at(n int) byte {
 	return unsafe { (&[]byte(b))[n] }
@@ -123,7 +123,7 @@ pub fn (mut b Builder) cut_to(pos int) string {
 }
 
 // go_back_to resets the buffer to the given position `pos`
-// NB: pos should be < than the existing buffer length.
+// Note: pos should be < than the existing buffer length.
 pub fn (mut b Builder) go_back_to(pos int) {
 	b.trim(pos)
 }
@@ -162,7 +162,7 @@ pub fn (b &Builder) after(n int) string {
 }
 
 // str returns a copy of all of the accumulated buffer content.
-// NB: after a call to b.str(), the builder b should not be
+// Note: after a call to b.str(), the builder b should not be
 // used again, you need to call b.free() first, or just leave
 // it to be freed by -autofree when it goes out of scope.
 // The returned string *owns* its own separate copy of the

vlib/strings/strings.c.v

@@ -14,7 +14,7 @@ pub fn repeat(c byte, n int) string {
 }
 
 // strings.repeat_string - gives you `n` repetitions of the substring `s`
-// NB: strings.repeat, that repeats a single byte, is between 2x
+// Note: strings.repeat, that repeats a single byte, is between 2x
 // and 24x faster than strings.repeat_string called for a 1 char string.
 pub fn repeat_string(s string, n int) string {
 	if n <= 0 || s.len == 0 {

vlib/strings/textscanner/textscanner.v

@@ -129,7 +129,7 @@ pub fn (ss &TextScanner) peek_back_n(n int) int {
 
 // current returns the current character code from the input text.
 // current returns `-1` at the start of the input text.
-// NB: after `c := ts.next()`, `ts.current()` will also return `c`.
+// Note: after `c := ts.next()`, `ts.current()` will also return `c`.
 [direct_array_access; inline]
 pub fn (mut ss TextScanner) current() int {
 	if ss.pos > 0 {