Fix trailing spaces/tabs in yaml syntax files (#3200)

Signed-off-by: Yevhen Babiichuk (DustDFG) <dfgdust@gmail.com>

runtime/syntax/solidity.yaml

@@ -21,12 +21,12 @@ rules:
         start: "//"
         end: "$"
         rules: []
-    - comment: 
+    - comment:
         start: "/\\*"
         end: "\\*/"
         rules: []
     - todo: "TODO:?"
-    - constant.string: 
+    - constant.string:
         start: "\""
         end: "\""
         skip: "\\\\."