// 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.

	lastStackScan atomic.Uint64

	// maxStackScan is the amount of allocated goroutine stack space in
	// use by goroutines.
	//
	// This number tracks allocated goroutine stack space rather than used
	// goroutine stack space (i.e. what is actually scanned) because used
	// goroutine stack space is much harder to measure cheaply. By using
	// allocated space, we make an overestimate; this is OK, it's better

// 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)

  }

  // Iterate through block argument and its convolution users. Space to depth
  // transform will be applied only if all the below conditions are satisfied:
  //  1. All the users of the block argument will lead to convolutions;
  //  2. block_size of for the space to depth transform for these convolutions
  //     are the same;
  //  3. block_size of for the space to depth transform for these convolutions
  //     are larger than 1.

Second, if you are compiling a Go program not in a work space,
you can use a relative path in an import statement in that program
to refer to nearby code also not in a work space.
This makes it easy to experiment with small multipackage programs
outside of the usual work spaces, but such programs cannot be
installed with "go install" (there is no work space in which to install them),

	t := *s
	for n := 0; n < max; n++ {
		if t.spaces > 0 {
			t.spaces--
			continue
		}
		if t.i >= len(t.text) && eolOK {
			continue
		}
		if t.i < len(t.text) {
			switch t.text[t.i] {
			case '\t':
				t.spaces = 4 - (t.i-t.tab)&3 - 1
				t.i++
				t.tab = t.i
				continue
			case ' ':
				t.i++
				continue
			}
		}
		if n >= min {
			break
		}

	`[:lower:]`:   {+1, code11},
	`[:^lower:]`:  {-1, code11},
	`[:print:]`:   {+1, code12},
	`[:^print:]`:  {-1, code12},
	`[:punct:]`:   {+1, code13},
	`[:^punct:]`:  {-1, code13},
	`[:space:]`:   {+1, code14},
	`[:^space:]`:  {-1, code14},
	`[:upper:]`:   {+1, code15},
	`[:^upper:]`:  {-1, code15},
	`[:word:]`:    {+1, code16},
	`[:^word:]`:   {-1, code16},
	`[:xdigit:]`:  {+1, code17},
	`[:^xdigit:]`: {-1, code17},

			expr:        `format.datetime().validate("2021-01-01T00:00:00Z")`,
			expectValue: types.OptionalNone,
		},
		{
			name:        "dns1123Label",
			expr:        `format.dns1123Label().validate("contains a space")`,

				Port:    9411,
			},
			valid: true,
		},
		{
			name: "zipkin service with invalid namespace",
			config: &meshconfig.MeshConfig_ExtensionProvider_ZipkinTracingProvider{
				Service: "name/space/zipkin.istio-system",
				Port:    9411,
			},
			valid: false,
		},
		{
			name: "zipkin service with port",
			config: &meshconfig.MeshConfig_ExtensionProvider_ZipkinTracingProvider{

	if bytes.ContainsAny(s, "#?") {
		c.urlPart = urlPartQueryOrFrag
	} else if len(s) != eatWhiteSpace(s, 0) && c.urlPart == urlPartNone {
		// HTML5 uses "Valid URL potentially surrounded by spaces" for
		// attrs: https://www.w3.org/TR/html5/index.html#attributes-1
		c.urlPart = urlPartPreQuery
	}
	return c, len(s)
}

// tJS is the context transition function for the JS state.