all: remove broken escape sequences after $ in strings

vlib/v/builder/c.v

@@ -84,8 +84,8 @@ pub fn (mut b Builder) compile_c() {
 		bundle_name := b.pref.out_name.split('/').last()
 		bundle_id := if b.pref.bundle_id != '' { b.pref.bundle_id } else { 'app.vlang.$bundle_name' }
 		display_name := if b.pref.display_name != '' { b.pref.display_name } else { bundle_name }
-		os.mkdir('$display_name\.app')
-		os.write_file('$display_name\.app/Info.plist', make_ios_plist(display_name, bundle_id,
+		os.mkdir('${display_name}.app')
+		os.write_file('${display_name}.app/Info.plist', make_ios_plist(display_name, bundle_id,
 			bundle_name, 1))
 	}
 	b.cc()

vlib/v/builder/cc.v

@@ -439,7 +439,7 @@ fn (mut v Builder) cc() {
 	// Output executable name
 	if v.pref.os == .ios {
 		bundle_name := v.pref.out_name.split('/').last()
-		args << '-o "$v.pref.out_name\.app/$bundle_name"'
+		args << '-o "${v.pref.out_name}.app/$bundle_name"'
 	} else {
 		args << '-o "$v.pref.out_name"'
 	}

vlib/v/builder/compile.v

@@ -92,7 +92,7 @@ fn (mut b Builder) run_compiled_executable_and_exit() {
 		os.exec('xcrun simctl boot $device')
 		bundle_name := b.pref.out_name.split('/').last()
 		display_name := if b.pref.display_name != '' { b.pref.display_name } else { bundle_name }
-		os.exec('xcrun simctl install $device $display_name\.app')
+		os.exec('xcrun simctl install $device ${display_name}.app')
 		bundle_id := if b.pref.bundle_id != '' { b.pref.bundle_id } else { 'app.vlang.$bundle_name' }
 		os.exec('xcrun simctl launch $device $bundle_id')
 	} else {

vlib/v/checker/checker.v

@@ -2731,19 +2731,19 @@ fn (mut c Checker) hash_stmt(mut node ast.HashStmt) {
 
 fn (mut c Checker) import_stmt(imp ast.Import) {
 	for sym in imp.syms {
-		name := '$imp.mod\.$sym.name'
+		name := '${imp.mod}.$sym.name'
 		if sym.kind == .fn_ {
 			c.table.find_fn(name) or {
-				c.error('module `$imp.mod` has no public fn named `$sym.name\()`', sym.pos)
+				c.error('module `$imp.mod` has no public fn named `${sym.name}()`', sym.pos)
 			}
 		}
 		if sym.kind == .type_ {
 			if type_sym := c.table.find_type(name) {
 				if type_sym.kind == .placeholder || !type_sym.is_public {
-					c.error('module `$imp.mod` has no public type `$sym.name\{}`', sym.pos)
+					c.error('module `$imp.mod` has no public type `$sym.name{}`', sym.pos)
 				}
 			} else {
-				c.error('module `$imp.mod` has no public type `$sym.name\{}`', sym.pos)
+				c.error('module `$imp.mod` has no public type `$sym.name{}`', sym.pos)
 			}
 		}
 	}

vlib/v/gen/auto_str_methods.v

@@ -77,7 +77,7 @@ fn (mut g Gen) gen_str_for_type_with_styp(typ table.Type, styp string) string {
 				g.gen_str_for_union_sum_type(sym.info, styp, str_fn_name)
 			}
 			else {
-				verror("could not generate string method $str_fn_name for type \'$styp\'")
+				verror("could not generate string method $str_fn_name for type '$styp'")
 			}
 		}
 	}
@@ -512,7 +512,7 @@ fn (mut g Gen) gen_str_for_union_sum_type(info table.SumType, styp string, str_f
 	for typ in info.variants {
 		mut value_fmt := '%.*s\\000'
 		if typ == table.string_type {
-			value_fmt = "\'$value_fmt\'"
+			value_fmt = "'$value_fmt'"
 		}
 		typ_str := g.typ(typ)
 		mut func_name := if typ_str in gen_fn_names { gen_fn_names[typ_str] } else { g.gen_str_for_type_with_styp(typ,

vlib/v/parser/parser.v

@@ -1612,7 +1612,7 @@ fn (mut p Parser) import_syms(mut parent ast.Import) {
 	for p.tok.kind == .name {
 		pos := p.tok.position()
 		alias := p.check_name()
-		name := '$parent.mod\.$alias'
+		name := '${parent.mod}.$alias'
 		if alias[0].is_capital() {
 			idx := p.table.add_placeholder_type(name, .v)
 			typ := table.new_type(idx)

vlib/v/scanner/scanner.v

@@ -579,9 +579,12 @@ fn (mut s Scanner) text_scan() token.Token {
 			}
 			// end of `$expr`
 			// allow `'$a.b'` and `'$a.c()'`
+			if s.is_inter_start && next_char == `\\` && s.look_ahead(2) !in [`n`, `\\`, `t`] {
+				// s.warn('unknown escape sequence \\${s.look_ahead(2)}')
+			}
 			if s.is_inter_start && next_char == `(` {
 				if s.look_ahead(2) != `)` {
-					s.warn('use e.g. `\${f(expr)}` or `\$name\\(` instead of `\$f(expr)`')
+					s.warn('use `\${f(expr)}` instead of `\$f(expr)`')
 				}
 			} else if s.is_inter_start && next_char != `.` {
 				s.is_inter_end = true
@@ -1036,7 +1039,7 @@ fn (mut s Scanner) ident_string() string {
 				s.error(r'cannot use `\x00` (NULL character) in the string literal')
 			}
 		}
-		// ${var} (ignore in vfmt mode)
+		// ${var} (ignore in vfmt mode) (skip \$)
 		if prevc == `$` && c == `{` && !is_raw && s.count_symbol_before(s.pos - 2, slash) % 2 == 0 {
 			s.is_inside_string = true
 			// so that s.pos points to $ at the next step