http://ExAmPlE.CoM http://other.com/ s:http p:/ h:example.com

# Spaces should fail
http://example\sexample.com

# This should fail
http://Goo%20\sgoo%7C|.com

# U+3000 is mapped to U+0020 (space) which is disallowed
http://GOO\u00a0\u3000goo.com

# Other types of space (no-break, zero-width, zero-width-no-break) are
# name-prepped away to nothing.

 */

/*
aligned in middle
here
        not here
*/

/*
blank line in middle:

with no leading spaces on blank line.
*/

/*
   aligned in middle
   here
           not here
*/

/*
	blank line in middle:

	with no leading spaces on blank line.
*/

func _() {
	/*
	 * line
	 * of
	 * stars
	 */

	/*
	aligned in middle

	}
	return
}

// command:
//
//	operand (space operand)*
//
// space-separated arguments up to a pipeline character or right delimiter.
// we consume the pipe character but leave the right delim to terminate the action.
func (t *Tree) command() *CommandNode {
	cmd := t.newCommand(t.peekNonSpace().pos)
	for {
		t.peekNonSpace() // skip leading spaces.
		operand := t.operand()
		if operand != nil {

			b = append(b, '\\')
		}
		b = append(b, '"')
	}

	return b
}

// makeCmdLine builds a command line out of args by escaping "special"
// characters and joining the arguments with spaces.
func makeCmdLine(args []string) string {
	var b []byte
	for _, v := range args {
		if len(b) > 0 {
			b = append(b, ' ')
		}
		b = appendEscapeArg(b, v)
	}
	return string(b)
}

)

// addrRange represents a region of address space.
//
// An addrRange must never span a gap in the address space.
type addrRange struct {
	// base and limit together represent the region of address space
	// [base, limit). That is, base is inclusive, limit is exclusive.
	// These are address over an offset view of the address space on
	// platforms with a segmented address space, that is, on platforms
	// where arenaBaseOffset != 0.

			checker: func(t *testing.T, c []gcCycleResult) {
				n := len(c)
				if n >= 25 {
					// At this alloc/scan rate, the pacer should be extremely close to the goal utilization.
					assertInEpsilon(t, "GC utilization", c[n-1].gcUtilization, GCGoalUtilization, 0.005)

					// Make sure the pacer settles into a non-degenerate state in at least 25 GC cycles.

// (starts with a leading space or tab).
func indented(line string) bool {
	return line != "" && (line[0] == ' ' || line[0] == '\t')
}

// unindent removes any common space/tab prefix
// from each line in lines, returning a copy of lines in which
// those prefixes have been trimmed from each line.
// It also replaces any lines containing only spaces with blank lines (empty strings).

	// two characters (7 vs. 07), use an _ instead of a space in the layout string.
	// Here we print just the day, which is 2 in our layout string and 7 in our
	// value.
	do("No pad", "<2>", "<7>")

	// An underscore represents a space pad, if the date only has one digit.
	do("Spaces", "<_2>", "< 7>")

	// A "0" indicates zero padding for single-digit values.

// c could change.
func (c *mcache) refill(spc spanClass) {
	// Return the current cached span to the central lists.
	s := c.alloc[spc]

	if s.allocCount != s.nelems {
		throw("refill of span with free space remaining")
	}
	if s != &emptymspan {
		// Mark this span as no longer cached.
		if s.sweepgen != mheap_.sweepgen+3 {
			throw("bad sweepgen in refill")
		}
		mheap_.central[spc].mcentral.uncacheSpan(s)

			hexByLine[fmt.Sprintf("%s:%d", input, lineno)] = hexes
		}

		// Canonicalize spacing in printed form.
		// First field is opcode, then tab, then arguments separated by spaces.
		// Canonicalize spaces after commas first.
		// Comma to separate argument gets a space; comma within does not.
		var buf []byte
		nest := 0
		for i := 0; i < len(printed); i++ {
			c := printed[i]
			switch c {
			case '{', '[':
				nest++