vim-patch:8.1.1705: using ~{} for a literal dict is not nice

Problem:    Using ~{} for a literal dict is not nice.
Solution:   Use #{} instead.
4c6d90458b

runtime/doc/eval.txt

@@ -40,7 +40,7 @@ Dictionary	An associative, unordered array: Each entry has a key and a
 		value. |Dictionary|
 		Examples:
 			{'blue': "#0000ff", 'red': "#ff0000"}
-			~{blue: "#0000ff", red: "#ff0000"}
+			#{blue: "#0000ff", red: "#ff0000"}
 
 The Number and String types are converted automatically, depending on how they
 are used.
@@ -441,11 +441,11 @@ entry.  Note that the String '04' and the Number 04 are different, since the
 Number will be converted to the String '4'.  The empty string can also be used
 as a key.
 						*literal-Dict*
-To avoid having to put quotes around every key the ~{} form can be used.  This
+To avoid having to put quotes around every key the #{} form can be used.  This
 does require the key to consist only of ASCII letters, digits, '-' and '_'.
 Example: >
-	let mydict = ~{zero: 0, one_key: 1, two-key: 2, 333: 3}
-Note that 333 here is the string "333".  Empty keys are not possible here.
+	let mydict = #{zero: 0, one_key: 1, two-key: 2, 333: 3}
+Note that 333 here is the string "333".  Empty keys are not possible with #{}.
 
 A value can be any expression.  Using a Dictionary for a value creates a
 nested Dictionary: >

src/nvim/eval.c

@@ -3906,7 +3906,7 @@ static int eval6(char_u **arg, typval_T *rettv, int evaluate, int want_string)
 //  (expression) nested expression
 //  [expr, expr] List
 //  {key: val, key: val}  Dictionary
-//  ~{key: val, key: val}  Dictionary with literal keys
+//  #{key: val, key: val}  Dictionary with literal keys
 //
 //  Also handle:
 //  ! in front  logical NOT
@@ -4014,8 +4014,8 @@ static int eval7(
   case '[':   ret = get_list_tv(arg, rettv, evaluate);
     break;
 
-  // Dictionary: ~{key: val, key: val}
-  case '~':
+  // Dictionary: #{key: val, key: val}
+  case '#':
     if ((*arg)[1] == '{') {
       (*arg)++;
       ret = dict_get_tv(arg, rettv, evaluate, true);

src/nvim/testdir/test_listdict.vim

@@ -281,7 +281,7 @@ func Test_dict_func_remove_in_use()
 endfunc
 
 func Test_dict_literal_keys()
-  call assert_equal({'one': 1, 'two2': 2, '3three': 3, '44': 4}, ~{one: 1, two2: 2, 3three: 3, 44: 4},)
+  call assert_equal({'one': 1, 'two2': 2, '3three': 3, '44': 4}, #{one: 1, two2: 2, 3three: 3, 44: 4},)
 
   " why *{} cannot be used
   let blue = 'blue'