all: fix tests

Author: medvednikov

cmd/tools/vtest-self.v

@@ -90,8 +90,6 @@ const essential_list = [
 	'vlib/v/fmt/fmt_test.v',
 	'vlib/v/gen/c/coutput_test.v',
 	'vlib/v/gen/js/program_test.v',
-	'vlib/v/gen/native/macho_test.v',
-	'vlib/v/gen/native/tests/native_test.v',
 	'vlib/v/pkgconfig/pkgconfig_test.v',
 	'vlib/v/slow_tests/inout/compiler_test.v',
 	'vlib/x/json2/tests/json2_test.v',

vlib/builtin/float.c.v

@@ -33,8 +33,13 @@ pub fn (x f64) str() string {
 // strg return a `f64` as `string` in "g" printf format.
 @[inline]
 pub fn (x f64) strg() string {
-	if x == 0 {
-		return '0.0'
+	unsafe {
+		f := strconv.Float64u{
+			f: x
+		}
+		if f.u == strconv.double_minus_zero || f.u == strconv.double_plus_zero {
+			return '0.0'
+		}
 	}
 	abs_x := f64_abs(x)
 	if abs_x >= 0.0001 && abs_x < 1.0e6 {
@@ -99,8 +104,13 @@ pub fn (x f32) str() string {
 // strg return a `f32` as `string` in "g" printf format
 @[inline]
 pub fn (x f32) strg() string {
-	if x == 0 {
-		return '0.0'
+	unsafe {
+		f := strconv.Float32u{
+			f: x
+		}
+		if f.u == strconv.single_minus_zero || f.u == strconv.single_plus_zero {
+			return '0.0'
+		}
 	}
 	abs_x := f32_abs(x)
 	if abs_x >= 0.0001 && abs_x < 1.0e6 {

vlib/builtin/js/map_test.js.v

@@ -1,7 +1,6 @@
 // vtest retry: 3
 // vtest build: present_node?
 import rand
-import strings
 
 const strings = unique_strings(200, 10)
 

vlib/builtin/map_test.v

@@ -1,5 +1,4 @@
 import rand
-import strings
 
 const strings = unique_strings(7000, 10)
 

vlib/v/checker/str.v

@@ -168,6 +168,7 @@ fn (mut c Checker) string_inter_lit(mut node ast.StringInterLiteral) ast.Type {
 					node.fmt_poss[i])
 			}
 			node.need_fmts[i] = fmt != c.get_default_fmt(ftyp, typ)
+				|| (typ.is_float() && fmt in [`g`, `G`])
 		}
 		// check recursive str
 		if c.table.cur_fn != unsafe { nil } && c.table.cur_fn.is_method