diff --git a/vlib/v/gen/cgen.v b/vlib/v/gen/cgen.v
index f1819d2e94..deb6758371 100644
--- a/vlib/v/gen/cgen.v
+++ b/vlib/v/gen/cgen.v
@@ -804,10 +804,10 @@ fn (mut g Gen) stmt(node ast.Stmt) {
 			g.write_v_source_line_info(node.pos)
 			if node.label.len > 0 {
 				if node.kind == .key_break {
-					g.writeln('goto $node.label\__break;')
+					g.writeln('goto ${node.label}__break;')
 				} else {
 					// assert node.kind == .key_continue
-					g.writeln('goto $node.label\__continue;')
+					g.writeln('goto ${node.label}__continue;')
 				}
 			} else {
 				// continue or break
@@ -945,11 +945,11 @@ fn (mut g Gen) stmt(node ast.Stmt) {
 			g.is_vlines_enabled = true
 			g.stmts(node.stmts)
 			if node.label.len > 0 {
-				g.writeln('$node.label\__continue: {}')
+				g.writeln('${node.label}__continue: {}')
 			}
 			g.writeln('}')
 			if node.label.len > 0 {
-				g.writeln('$node.label\__break: {}')
+				g.writeln('${node.label}__break: {}')
 			}
 		}
 		ast.ForInStmt {
@@ -974,11 +974,11 @@ fn (mut g Gen) stmt(node ast.Stmt) {
 			g.is_vlines_enabled = true
 			g.stmts(node.stmts)
 			if node.label.len > 0 {
-				g.writeln('\t$node.label\__continue: {}')
+				g.writeln('\t${node.label}__continue: {}')
 			}
 			g.writeln('}')
 			if node.label.len > 0 {
-				g.writeln('$node.label\__break: {}')
+				g.writeln('${node.label}__break: {}')
 			}
 		}
 		ast.GlobalDecl {
@@ -1178,21 +1178,21 @@ fn (mut g Gen) for_in(it ast.ForInStmt) {
 		g.write('$atmp_styp $atmp = ')
 		g.expr(it.cond)
 		g.writeln(';')
-		g.writeln('for (int $idx = 0; $idx < $atmp\.key_values.len; ++$idx) {')
-		g.writeln('\tif ($atmp\.key_values.keys[$idx].str == 0) {continue;}')
+		g.writeln('for (int $idx = 0; $idx < ${atmp}.key_values.len; ++$idx) {')
+		g.writeln('\tif (${atmp}.key_values.keys[$idx].str == 0) {continue;}')
 		if it.key_var != '_' {
 			key_styp := g.typ(it.key_type)
 			key := c_name(it.key_var)
 			// TODO: analyze whether it.key_type has a .clone() method and call .clone() for all types:
 			if it.key_type == table.string_type {
-				g.writeln('\t$key_styp $key = /*kkkk*/ string_clone($atmp\.key_values.keys[$idx]);')
+				g.writeln('\t$key_styp $key = /*key*/ string_clone(${atmp}.key_values.keys[$idx]);')
 			} else {
-				g.writeln('\t$key_styp $key = /*kkkk*/ $atmp\.key_values.keys[$idx];')
+				g.writeln('\t$key_styp $key = /*key*/ ${atmp}.key_values.keys[$idx];')
 			}
 		}
 		if it.val_var != '_' {
 			val_sym := g.table.get_type_symbol(it.val_type)
-			valstr := '(void*)($atmp\.key_values.values + $idx * (u32)($atmp\.value_bytes))'
+			valstr := '(void*)(${atmp}.key_values.values + $idx * (u32)(${atmp}.value_bytes))'
 			if val_sym.kind == .function {
 				g.write('\t')
 				g.write_fn_ptr_decl(val_sym.info as table.FnType, c_name(it.val_var))
@@ -1207,11 +1207,11 @@ fn (mut g Gen) for_in(it ast.ForInStmt) {
 			// g.writeln('string_free(&$key);')
 		}
 		if it.label.len > 0 {
-			g.writeln('\t$it.label\__continue: {}')
+			g.writeln('\t${it.label}__continue: {}')
 		}
 		g.writeln('}')
 		if it.label.len > 0 {
-			g.writeln('\t$it.label\__break: {}')
+			g.writeln('\t${it.label}__break: {}')
 		}
 		return
 	} else if it.cond_type.has_flag(.variadic) {
@@ -1240,11 +1240,11 @@ fn (mut g Gen) for_in(it ast.ForInStmt) {
 	}
 	g.stmts(it.stmts)
 	if it.label.len > 0 {
-		g.writeln('\t$it.label\__continue: {}')
+		g.writeln('\t${it.label}__continue: {}')
 	}
 	g.writeln('}')
 	if it.label.len > 0 {
-		g.writeln('\t$it.label\__break: {}')
+		g.writeln('\t${it.label}__break: {}')
 	}
 }
 
@@ -5566,7 +5566,7 @@ fn (mut g Gen) gen_str_default(sym table.TypeSymbol, styp string, str_fn_name st
 		convertor = 'bool'
 		typename_ = 'bool'
 	} else {
-		verror("could not generate string method for type \'$styp\'")
+		verror("could not generate string method for type '$styp'")
 	}
 	g.type_definitions.writeln('string ${str_fn_name}($styp it); // auto')
 	g.auto_str_funcs.writeln('string ${str_fn_name}($styp it) {')
diff --git a/vlib/v/gen/js/js.v b/vlib/v/gen/js/js.v
index 9e7600c8c7..3668bd4973 100644
--- a/vlib/v/gen/js/js.v
+++ b/vlib/v/gen/js/js.v
@@ -15,8 +15,7 @@ const (
 		'public', 'return', 'static', 'super', 'switch', 'this', 'throw', 'try', 'typeof', 'var', 'void',
 		'while', 'with', 'yield']
 	tabs        = ['', '\t', '\t\t', '\t\t\t', '\t\t\t\t', '\t\t\t\t\t', '\t\t\t\t\t\t', '\t\t\t\t\t\t\t',
-		'\t\t\t\t\t\t\t\t', '\t\t\t\t\t\t\t\t\t', '\t\t\t\t\t\t\t\t\t', '\t\t\t\t\t\t\t\t\t'
-	]
+		'\t\t\t\t\t\t\t\t', '\t\t\t\t\t\t\t\t\t', '\t\t\t\t\t\t\t\t\t', '\t\t\t\t\t\t\t\t\t']
 )
 
 struct JsGen {
@@ -1012,8 +1011,8 @@ fn (mut g JsGen) gen_go_stmt(node ast.GoStmt) {
 				name = receiver_sym.name + '.' + name
 			}
 			// todo: please add a name feild without the mod name for ast.CallExpr
-			if name.starts_with('$node.call_expr.mod\.') {
-				name = name[node.call_expr.mod.len+1..]
+			if name.starts_with('${node.call_expr.mod}.') {
+				name = name[node.call_expr.mod.len + 1..]
 			}
 			g.writeln('await new Promise(function(resolve){')
 			g.inc_indent()
@@ -1245,7 +1244,7 @@ fn (mut g JsGen) gen_call_expr(it ast.CallExpr) {
 		match it.or_block.kind {
 			.block {
 				if it.or_block.stmts.len > 1 {
-					g.stmts(it.or_block.stmts[..it.or_block.stmts.len-1])
+					g.stmts(it.or_block.stmts[..it.or_block.stmts.len - 1])
 				}
 				g.write('return ')
 				g.stmt(it.or_block.stmts.last())
diff --git a/vlib/v/scanner/scanner.v b/vlib/v/scanner/scanner.v
index ebea4a94aa..7210d2b77e 100644
--- a/vlib/v/scanner/scanner.v
+++ b/vlib/v/scanner/scanner.v
@@ -580,7 +580,7 @@ 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)}')
+				s.warn('unknown escape sequence \\${s.look_ahead(2)}')
 			}
 			if s.is_inter_start && next_char == `(` {
 				if s.look_ahead(2) != `)` {