[language] allow multiline strings

test/results/custom text formatting.ans

@@ -1,7 +1,6 @@
 --# run #--
 --- text ---
-| {}"" {}"\"Name: Darmanin\\\
-Age: 38\"" {}"" |
+| {}"" {}"\"Name: Darmanin\nAge: 38\"" {}"" |
 --- return ---
 ()
 --# saved #--

test/results/loop decorator.ans

@@ -1,25 +1,15 @@
 --# run #--
 --- text ---
-| {}"" {}"1" {}"" {}"\
-" {}"" |
-| {}"" {}"2" {}"" {}"\
-" {}"" |
-| {}"" {}"3" {}"" {}"\
-" {}"" |
-| {}"" {}"4" {}"" {}"\
-" {}"" |
-| {}"" {}"5" {}"" {}"\
-" {}"" |
-| {}"" {}"6" {}"" {}"\
-" {}"" |
-| {}"" {}"7" {}"" {}"\
-" {}"" |
-| {}"" {}"8" {}"" {}"\
-" {}"" |
-| {}"" {}"9" {}"" {}"\
-" {}"" |
-| {}"" {}"10" {}"" {}"\
-" {}"" |
+| {}"" {}"1" {}"" |
+| {}"" {}"2" {}"" |
+| {}"" {}"3" {}"" |
+| {}"" {}"4" {}"" |
+| {}"" {}"5" {}"" |
+| {}"" {}"6" {}"" |
+| {}"" {}"7" {}"" |
+| {}"" {}"8" {}"" |
+| {}"" {}"9" {}"" |
+| {}"" {}"10" {}"" |
 --- text ---
 | {}"" {}"11" {}"" |
 --- return ---

test/results/multiline string.ans

@@ -0,0 +1,5 @@
+--# run #--
+--- return ---
+"foo\nbar\n\ta\n\tb\n\t  c\n d"
+--# saved #--
+{}

test/results/string escaping.ans

@@ -4,10 +4,9 @@
 --- text ---
 | {}"quote " {}"\"" {}"" |
 --- text ---
-| {}"other codes " {}"\
-" {}" " {}"\\" {}" " {}"\9" {}" " {}"{" {}"braces}" |
+| {}"other codes " {}"\n" {}" " {}"\" {}" " {}"\t" {}" " {}"{" {}"braces}" |
 --- text ---
-| {}"" {}"escaping expressions abc and {stuff} \\ and quotes \"" {}"" |
+| {}"" {}"escaping expressions abc and {stuff} \ and quotes \"" {}"" |
 --- return ---
 ()
 --# saved #--

test/results/text escaping.ans

@@ -4,8 +4,7 @@
 --- text ---
 | {}"quote " {}"\"" {}"" |
 --- text ---
-| {}"other codes " {}"\
-" {}" " {}"\\" {}" " {}"\9" {}"" |
+| {}"other codes " {}"\n" {}" " {}"\" {}" " {}"\t" {}"" |
 --- text ---
 | {}"decorators " {}"#" {}" tag " {}"~" {}" condition " {}"$" {}" fn" |
 --- text ---