highlight(matlab): Fix string's single-quote's color (#7493)

runtime/queries/matlab/highlights.scm

@@ -41,39 +41,6 @@
 
 (function_arguments (identifier) @variable.parameter)
 
-; Operators
-
-[
- "+"
- ".+"
- "-"
- ".*"
- "*"
- ".*"
- "/"
- "./"
- "\\"
- ".\\"
- "^"
- ".^"
- "'"
- ".'"
- "|"
- "&"
- "?"
- "@"
- "<"
- "<="
- ">"
- ">="
- "=="
- "~="
- "="
- "&&"
- "||"
- ":"
-] @operator
-
 ; Conditionals
 
 (if_statement [ "if" "end" ] @keyword.control.conditional)
@@ -106,12 +73,46 @@
 (formatting_sequence) @constant.character.escape
 (string) @string
 (number) @constant.numeric.float
+(unary_operator ["+" "-"] @constant.numeric.float)
 (boolean) @constant.builtin.boolean
 
 ; Comments
 
 [ (comment) (line_continuation) ] @comment.line
 
+; Operators
+
+[
+ "+"
+ ".+"
+ "-"
+ ".*"
+ "*"
+ ".*"
+ "/"
+ "./"
+ "\\"
+ ".\\"
+ "^"
+ ".^"
+ "'"
+ ".'"
+ "|"
+ "&"
+ "?"
+ "@"
+ "<"
+ "<="
+ ">"
+ ">="
+ "=="
+ "~="
+ "="
+ "&&"
+ "||"
+ ":"
+] @operator
+
 ; Keywords
 
 "classdef" @keyword.storage.type