runtime(vim): Update base-syntax, fix is/isnot operator matching

- Match is? and isnot? operators.
- Limit other comparison operators to one match modifier rather than
  two.

closes: #16482

Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/syntax/testdir/dumps/vim_expr_01.dump b/runtime/syntax/testdir/dumps/vim_expr_01.dump
index 7dfc6d4..ca2875d 100644
--- a/runtime/syntax/testdir/dumps/vim_expr_01.dump
+++ b/runtime/syntax/testdir/dumps/vim_expr_01.dump
@@ -17,4 +17,4 @@
 |e+0#af5f00255&|c|h|o| +0#0000000&|'+0#e000002&|f|o@1|'+0#e000e06&@1|'+0#e000002&| +0#0000000&@62
 |e+0#af5f00255&|c|h|o| +0#0000000&|'+0#e000002&|f|o@1|'+0#e000e06&@1|b+0#e000002&|a|r|'| +0#0000000&@59
 @75
-@57|1|5|,|1| @9|1|4|%| 
+@57|1|5|,|1| @10|9|%| 
diff --git a/runtime/syntax/testdir/dumps/vim_expr_02.dump b/runtime/syntax/testdir/dumps/vim_expr_02.dump
index 37e5b04..da1a0d9 100644
--- a/runtime/syntax/testdir/dumps/vim_expr_02.dump
+++ b/runtime/syntax/testdir/dumps/vim_expr_02.dump
@@ -17,4 +17,4 @@
 |e+0#af5f00255&|c|h|o| +0#0000000&|$+0#e000002&|'|'+0#e000e06&@1|f+0#e000002&|o@1|'| +0#0000000&@61
 |e+0#af5f00255&|c|h|o| +0#0000000&|$+0#e000002&|'|f|o@1|'+0#e000e06&@1|'+0#e000002&| +0#0000000&@61
 |e+0#af5f00255&|c|h|o| +0#0000000&|$+0#e000002&|'|f|o@1|'+0#e000e06&@1|b+0#e000002&|a|r|'| +0#0000000&@58
-@57|3|2|,|0|-|1| @7|3|6|%| 
+@57|3|2|,|0|-|1| @7|2|3|%| 
diff --git a/runtime/syntax/testdir/dumps/vim_expr_03.dump b/runtime/syntax/testdir/dumps/vim_expr_03.dump
index 178468d..74655c8 100644
--- a/runtime/syntax/testdir/dumps/vim_expr_03.dump
+++ b/runtime/syntax/testdir/dumps/vim_expr_03.dump
@@ -17,4 +17,4 @@
 |e+0#af5f00255&|c|h|o| +0#0000000&@1|0+0#e000002&|o|3|7@1| +0#0000000&@63
 |e+0#af5f00255&|c|h|o| +0#0000000&@1|0+0#e000002&|O|3|7@1| +0#0000000&@63
 |e+0#af5f00255&|c|h|o| +0#0000000&|-+0#af5f00255&|0+0#e000002&|3|7@1| +0#0000000&@64
-@57|5|0|,|1| @9|6|1|%| 
+@57|5|0|,|1| @9|3|9|%| 
diff --git a/runtime/syntax/testdir/dumps/vim_expr_04.dump b/runtime/syntax/testdir/dumps/vim_expr_04.dump
index 1a054e6..c760613 100644
--- a/runtime/syntax/testdir/dumps/vim_expr_04.dump
+++ b/runtime/syntax/testdir/dumps/vim_expr_04.dump
@@ -17,4 +17,4 @@
 |e+0#af5f00255&|c|h|o| +0#0000000&|1+0#e000002&|.|0|E|-|6| +0#0000000&@63
 |e+0#af5f00255&|c|h|o| +0#0000000&|-+0#af5f00255&|3+0#e000002&|.|1|4|1|6|e|+|8@1| +0#0000000&@58
 @75
-@57|6|8|,|1| @9|8|6|%| 
+@57|6|8|,|1| @9|5@1|%| 
diff --git a/runtime/syntax/testdir/dumps/vim_expr_05.dump b/runtime/syntax/testdir/dumps/vim_expr_05.dump
index 2c0a189..53f62dc 100644
--- a/runtime/syntax/testdir/dumps/vim_expr_05.dump
+++ b/runtime/syntax/testdir/dumps/vim_expr_05.dump
@@ -5,16 +5,16 @@
 |e+0#af5f00255&|c|h|o| +0#0000000&|0+0#e000002&|z|F@1|0@1|.|E|D|0|1|.|5|D|A|F| +0#0000000&@53
 >e+0#af5f00255&|c|h|o| +0#0000000&|0+0#e000002&|z|F@1|.|0@1|.|E|D|.|0|1|.|5|D|.|A|F| +0#0000000&@50
 @75
+|"+0#0000e05&| |O|p|e|r|a|t|o|r|s| +0#0000000&@63
 @75
-|"+0#0000e05&| |I|s@1|u|e| |#|1|6|2@1|1| |(|v|i|m|S|t|r|i|n|g| |b|e|c|o|m|e|s| |v|i|m|V|a|r| |w|h|e|n| |p|r|e|c|e|d|e|d| |b|y| |!|)| +0#0000000&@14
-|l+0#af5f00255&|e|t| +0#0000000&|b+0#00e0e07&|a|r| +0#0000000&|=+0#af5f00255&| +0#0000000&|!+0#af5f00255&|'+0#e000002&|g|:|b|a|r|'|-+0#af5f00255&|>|e+0#00e0e07&|x|i|s|t|s|(+0#e000e06&|)| +0#0000000&@46
-@75
-|~+0#4040ff13&| @73
-|~| @73
-|~| @73
-|~| @73
-|~| @73
-|~| @73
-|~| @73
-|~| @73
-| +0#0000000&@56|8|6|,|1| @9|B|o|t| 
+|"+0#0000e05&| |C|o|m|p|a|r|i|s|o|n| |-| |u|s|i|n|g| |'|i|g|n|o|r|c|a|s|e|'| +0#0000000&@42
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|=+0#af5f00255&@1| +0#0000000&@4|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|!+0#af5f00255&|=| +0#0000000&@4|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|>+0#af5f00255&| +0#0000000&@5|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|>+0#af5f00255&|=| +0#0000000&@4|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|<+0#af5f00255&| +0#0000000&@5|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|<+0#af5f00255&|=| +0#0000000&@4|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|=+0#af5f00255&|~| +0#0000000&@4|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|!+0#af5f00255&|~| +0#0000000&@4|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|i+0#af5f00255&|s| +0#0000000&@4|e+0#00e0e07&|x|p|r| +0#0000000&@53
+@57|8|6|,|1| @9|7|1|%| 
diff --git a/runtime/syntax/testdir/dumps/vim_expr_06.dump b/runtime/syntax/testdir/dumps/vim_expr_06.dump
new file mode 100644
index 0000000..9c58105
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/vim_expr_06.dump
@@ -0,0 +1,20 @@
+|e+0#af5f00255#ffffff0|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|i+0#af5f00255&|s| +0#0000000&@4|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|i+0#af5f00255&|s|n|o|t| +0#0000000&@1|e+0#00e0e07&|x|p|r| +0#0000000&@53
+@75
+|"+0#0000e05&| |C|o|m|p|a|r|i|s|o|n| |-| |m|a|t|c|h| |c|a|s|e| +0#0000000&@49
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|=+0#af5f00255&@1|#| +0#0000000&@3|e+0#00e0e07&|x|p|r| +0#0000000&@53
+>e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|!+0#af5f00255&|=|#| +0#0000000&@3|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|>+0#af5f00255&|#| +0#0000000&@4|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|>+0#af5f00255&|=|#| +0#0000000&@3|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|<+0#af5f00255&|#| +0#0000000&@4|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|<+0#af5f00255&|=|#| +0#0000000&@3|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|=+0#af5f00255&|~|#| +0#0000000&@3|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|!+0#af5f00255&|~|#| +0#0000000&@3|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|i+0#af5f00255&|s|#| +0#0000000&@3|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|i+0#af5f00255&|s|n|o|t|#| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@53
+@75
+|"+0#0000e05&| |C|o|m|p|a|r|i|s|o|n| |-| |i|g|n|o|r|e| |c|a|s|e| +0#0000000&@48
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|=+0#af5f00255&@1|?| +0#0000000&@3|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|!+0#af5f00255&|=|?| +0#0000000&@3|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|>+0#af5f00255&|?| +0#0000000&@4|e+0#00e0e07&|x|p|r| +0#0000000&@53
+@57|1|0|4|,|1| @8|8|7|%| 
diff --git a/runtime/syntax/testdir/dumps/vim_expr_07.dump b/runtime/syntax/testdir/dumps/vim_expr_07.dump
new file mode 100644
index 0000000..c32edfd
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/vim_expr_07.dump
@@ -0,0 +1,20 @@
+|e+0#af5f00255#ffffff0|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|>+0#af5f00255&|?| +0#0000000&@4|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|>+0#af5f00255&|=|?| +0#0000000&@3|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|<+0#af5f00255&|?| +0#0000000&@4|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|<+0#af5f00255&|=|?| +0#0000000&@3|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|=+0#af5f00255&|~|?| +0#0000000&@3|e+0#00e0e07&|x|p|r| +0#0000000&@53
+>e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|!+0#af5f00255&|~|?| +0#0000000&@3|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|i+0#af5f00255&|s|?| +0#0000000&@3|e+0#00e0e07&|x|p|r| +0#0000000&@53
+|e+0#af5f00255&|c|h|o| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&|i+0#af5f00255&|s|n|o|t|?| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@53
+@75
+|"+0#0000e05&| |U|n|r|e|p|o|r|t|e|d| |i|s@1|u|e| |(|i|n|c|o|r@1|e|c|t|l|y| |m|a|t|c|h|e|s| |a|s| |"+0#e000002&|e|c|h|o| |v|i|m|N|u|m|b|e|r| |*|v|i|m|C|o|m@1|a|n|d|*| |v|i|m
+|N|u|m|b|e|r|"|)+0#0000e05&| +0#0000000&@66
+|e+0#af5f00255&|c|h|o| +0#0000000&|4+0#e000002&|2| +0#0000000&|i+0#af5f00255&|s| +0#0000000&|4+0#e000002&|2| +0#0000000&@61
+@75
+|"+0#0000e05&| |I|s@1|u|e| |#|1|6|2@1|1| |(|v|i|m|S|t|r|i|n|g| |b|e|c|o|m|e|s| |v|i|m|V|a|r| |w|h|e|n| |p|r|e|c|e|d|e|d| |b|y| |!|)| +0#0000000&@14
+|l+0#af5f00255&|e|t| +0#0000000&|b+0#00e0e07&|a|r| +0#0000000&|=+0#af5f00255&| +0#0000000&|!+0#af5f00255&|'+0#e000002&|g|:|b|a|r|'|-+0#af5f00255&|>|e+0#00e0e07&|x|i|s|t|s|(+0#e000e06&|)| +0#0000000&@46
+@75
+|~+0#4040ff13&| @73
+|~| @73
+|~| @73
+| +0#0000000&@56|1|2@1|,|1| @8|B|o|t| 
diff --git a/runtime/syntax/testdir/input/vim_expr.vim b/runtime/syntax/testdir/input/vim_expr.vim
index 316f462..903db92 100644
--- a/runtime/syntax/testdir/input/vim_expr.vim
+++ b/runtime/syntax/testdir/input/vim_expr.vim
@@ -85,6 +85,46 @@
 echo 0zFF00.ED01.5DAF
 echo 0zFF.00.ED.01.5D.AF
 
+" Operators
+
+" Comparison - using 'ignorcase'
+echo expr ==     expr
+echo expr !=     expr
+echo expr >      expr
+echo expr >=     expr
+echo expr <      expr
+echo expr <=     expr
+echo expr =~     expr
+echo expr !~     expr
+echo expr is     expr
+echo expr isnot  expr
+
+" Comparison - match case
+echo expr ==#    expr
+echo expr !=#    expr
+echo expr >#     expr
+echo expr >=#    expr
+echo expr <#     expr
+echo expr <=#    expr
+echo expr =~#    expr
+echo expr !~#    expr
+echo expr is#    expr
+echo expr isnot# expr
+
+" Comparison - ignore case
+echo expr ==?    expr
+echo expr !=?    expr
+echo expr >?     expr
+echo expr >=?    expr
+echo expr <?     expr
+echo expr <=?    expr
+echo expr =~?    expr
+echo expr !~?    expr
+echo expr is?    expr
+echo expr isnot? expr
+
+" Unreported issue (incorrectly matches as "echo vimNumber *vimCommand* vimNumber")
+echo 42 is 42
 
 " Issue #16221 (vimString becomes vimVar when preceded by !)
 let bar = !'g:bar'->exists()