diff --git a/cmd/tools/repeat.v b/cmd/tools/repeat.v
index 6e0571a2dd..16ca9e9805 100644
--- a/cmd/tools/repeat.v
+++ b/cmd/tools/repeat.v
@@ -165,8 +165,8 @@ fn (mut context Context) parse_options() ! {
 	context.verbose = fp.bool('verbose', `v`, false, 'Be more verbose.')
 	context.fail_on_maxtime = fp.int('max_time', `m`, max_time, 'Fail with exit code 2, when first cmd takes above M milliseconds (regression).')
 	context.fail_on_regress_percent = fp.int('fail_percent', `f`, max_fail_percent, 'Fail with exit code 3, when first cmd is X% slower than the rest (regression).')
-	context.cmd_template = fp.string('template', `t`, '{T}', 'Command template. {T} will be substituted with the current command.')
-	cmd_params := fp.string_multi('parameter', `p`, 'A parameter substitution list. `{p}=val1,val2,val2` means that {p} in the template, will be substituted with each of val1, val2, val3.')
+	context.cmd_template = fp.string('template', `t`, r'{T}', r'Command template. {T} will be substituted with the current command.')
+	cmd_params := fp.string_multi('parameter', `p`, r'A parameter substitution list. `{p}=val1,val2,val2` means that {p} in the template, will be substituted with each of val1, val2, val3.')
 	context.nmins = fp.int('nmins', `i`, 0, 'Ignore the BOTTOM X results (minimum execution time). Makes the results more robust to performance flukes.')
 	context.nmaxs = fp.int('nmaxs', `a`, 1, 'Ignore the TOP X results (maximum execution time). Makes the results more robust to performance flukes.')
 	for p in cmd_params {
@@ -212,7 +212,7 @@ fn (mut context Context) clear_line() {
 fn (mut context Context) expand_all_commands(commands []string) []string {
 	mut all_commands := []string{}
 	for cmd in commands {
-		maincmd := context.cmd_template.replace('{T}', cmd)
+		maincmd := context.cmd_template.replace(r'{T}', cmd)
 		mut substituted_commands := []string{}
 		substituted_commands << maincmd
 		for paramk, paramlist in context.cmd_params {
diff --git a/cmd/tools/vbug.v b/cmd/tools/vbug.v
index f5cd708452..363a40ce63 100644
--- a/cmd/tools/vbug.v
+++ b/cmd/tools/vbug.v
@@ -141,7 +141,7 @@ $vdoctor_output
 
 **What did you do?**
 `v -g -o vdbg cmd/v && vdbg $file_path`
-{file_content}
+\{file_content}
 
 **What did you expect to see?**
 
@@ -150,11 +150,11 @@ $expected_result
 **What did you see instead?**
 ```
 $build_output```'
-	mut encoded_body := urllib.query_escape(raw_body.replace_once('{file_content}', '```v\n$file_content\n```'))
+	mut encoded_body := urllib.query_escape(raw_body.replace_once(r'{file_content}', '```v\n$file_content\n```'))
 	mut generated_uri := 'https://github.com/vlang/v/issues/new?labels=Bug&body=$encoded_body'
 	if generated_uri.len > 8192 {
 		// GitHub doesn't support URLs longer than 8192 characters
-		encoded_body = urllib.query_escape(raw_body.replace_once('{file_content}', 'See attached file `$file_path`'))
+		encoded_body = urllib.query_escape(raw_body.replace_once(r'{file_content}', 'See attached file `$file_path`'))
 		generated_uri = 'https://github.com/vlang/v/issues/new?labels=Bug&body=$encoded_body'
 		println('Your file is too big to be submitted. Head over to the following URL and attach your file.')
 		println(generated_uri)
diff --git a/vlib/builtin/js/array_test.js.v b/vlib/builtin/js/array_test.js.v
index d8520f0041..c9089e7fc8 100644
--- a/vlib/builtin/js/array_test.js.v
+++ b/vlib/builtin/js/array_test.js.v
@@ -504,7 +504,7 @@ fn test_struct_print() {
 	}
 	a.b << b
 	a.b << b
-	assert a.str() == '{Test [{1 2}, {1 2}]}'
+	assert a.str() == r'{Test [{1 2}, {1 2}]}'
 	assert b.str() == '{1 2}'
 	assert a.b.str() == '[{1 2}, {1 2}]'
 }
diff --git a/vlib/v/gen/js/js.v b/vlib/v/gen/js/js.v
index 7d9bab0464..346aa5f3f7 100644
--- a/vlib/v/gen/js/js.v
+++ b/vlib/v/gen/js/js.v
@@ -152,9 +152,9 @@ pub fn gen(files []&ast.File, table &ast.Table, pref &pref.Preferences) string {
 		// builtin types
 		if g.file.mod.name == 'builtin' && !g.generated_builtin {
 			g.gen_builtin_type_defs()
-			g.writeln('Object.defineProperty(array.prototype,"len", { get: function() {return new int(this.arr.arr.length);}, set: function(l) { this.arr.arr.length = l.valueOf(); } }); ')
-			g.writeln('Object.defineProperty(map.prototype,"len", { get: function() {return new int(this.length);}, set: function(l) { } }); ')
-			g.writeln('Object.defineProperty(array.prototype,"length", { get: function() {return new int(this.arr.arr.length);}, set: function(l) { this.arr.arr.length = l.valueOf(); } }); ')
+			g.writeln('Object.defineProperty(array.prototype,"len", { get: function() { return new int(this.arr.arr.length);}, set: function(l) { this.arr.arr.length = l.valueOf(); } }); ')
+			g.writeln('Object.defineProperty(map.prototype,"len", { get: function() { return new int(this.length);}, set: function(l) { } }); ')
+			g.writeln('Object.defineProperty(array.prototype,"length", { get: function() { return new int(this.arr.arr.length);}, set: function(l) { this.arr.arr.length = l.valueOf(); } }); ')
 			g.generated_builtin = true
 		}
 		if g.is_test && !tests_inited {