Highlight __matmul__, __rmatmul__, and __imatmul__

Author: 1st1

grammars/MagicPython.cson

@@ -1790,7 +1790,7 @@ repository:
             | rmul | ror | round | rpow | rrshift | rshift | rsub
             | rtruediv | rxor | set | setattr | setitem | setslice
             | setstate | sizeof | str | sub | subclasscheck | truediv
-            | trunc | unicode | xor
+            | trunc | unicode | xor | matmul | rmatmul | imatmul
           )__
         )\\b
       

grammars/MagicPython.tmLanguage

@@ -2760,7 +2760,7 @@ indirectly through syntactic constructs
       | rmul | ror | round | rpow | rrshift | rshift | rsub
       | rtruediv | rxor | set | setattr | setitem | setslice
       | setstate | sizeof | str | sub | subclasscheck | truediv
-      | trunc | unicode | xor
+      | trunc | unicode | xor | matmul | rmatmul | imatmul
     )__
   )\b
 </string>

grammars/src/MagicPython.syntax.yaml

@@ -1329,7 +1329,7 @@ repository:
             | rmul | ror | round | rpow | rrshift | rshift | rsub
             | rtruediv | rxor | set | setattr | setitem | setslice
             | setstate | sizeof | str | sub | subclasscheck | truediv
-            | trunc | unicode | xor
+            | trunc | unicode | xor | matmul | rmatmul | imatmul
           )__
         )\b
     captures:

test/builtins/builtins3.py

@@ -26,6 +26,9 @@
 some.__func__
 some.__self__
 some.__kwdefaults__
+some.__matmul__
+some.__imatmul__
+some.__rmatmul__
 some.__notspecial__
 
 
@@ -127,4 +130,13 @@
 __kwdefaults__ : source.python, support.variable.magic.python
 some          : source.python
 .             : source.python
+__matmul__    : source.python, support.function.magic.python
+some          : source.python
+.             : source.python
+__imatmul__   : source.python, support.function.magic.python
+some          : source.python
+.             : source.python
+__rmatmul__   : source.python, support.function.magic.python
+some          : source.python
+.             : source.python
 __notspecial__ : source.python