Test: additional testing of fixed issues

Double quotation char is missing, so added it
Added a test to see if the added escaping characters work

compiler/erg_parser/tests/test1_basic_syntax.er

@@ -6,7 +6,7 @@ a, _, ...b = five_elem_tuple
 f x, y =
     x + y
 if! True, do!:
-    print! "\\hello, world\""
+    print! "\"\\hello, world\\\""
     10.times! do!:
         if! x.y.z, do!:
             print! ""

compiler/erg_parser/tests/test3_literal_syntax.er

@@ -9,7 +9,7 @@
 0.00, -0.0, .1, 400.
 
 # Str Literal
-"", "a", "こんにちは", "\" \\ "
+"", "a", "こんにちは", "\"\\", "\"\'\\\0\r\n\t"
 
 # Boolean Litteral
 True, False

compiler/erg_parser/tests/tokenize_test.rs

@@ -37,7 +37,7 @@ fn test_lexer_for_basic() -> ParseResult<()> {
         (Comma, ","),
         (UBar, "_"),
         (Comma, ","),
-        (Spread, "..."), // EllipsisLit
+        (EllipsisLit, "..."),
         (Symbol, "b"),
         (Equal, "="),
         (Symbol, "five_elem_tuple"),
@@ -62,7 +62,7 @@ fn test_lexer_for_basic() -> ParseResult<()> {
         (Newline, newline),
         (Indent, "    "),
         (Symbol, "print!"),
-        (StrLit, "\"\\\\hello, world\\\"\""),
+        (StrLit, "\"\"\\hello, world\\\"\""),
         (Newline, newline),
         (NatLit, "10"),
         (Dot, "."),
@@ -264,7 +264,9 @@ fn test_lexer_for_literals() -> ParseResult<()> {
         (Comma, ","),
         (StrLit, "\"こんにちは\""),
         (Comma, ","),
-        (StrLit, "\"\\\" \\\\ \""),
+        (StrLit, "\"\"\\\""),
+        (Comma, ","),
+        (StrLit, "\"\"\'\\\0\r\n    \""),
         (Newline, newline),
         (Newline, newline),
         (Newline, newline),