Implement HTTPie Nested JSON v2

Author: isidentical

httpie/cli/argtypes.py

@@ -57,7 +57,7 @@ class KeyValueArgType:
 
     def __init__(self, *separators: str):
         self.separators = separators
-        self.special_characters = set('\\')
+        self.special_characters = set()
         for separator in separators:
             self.special_characters.update(separator)
 
@@ -113,7 +113,7 @@ def tokenize(self, s: str) -> List[Union[str, Escaped]]:
         There are only two token types - strings and escaped characters:
 
         >>> KeyValueArgType('=').tokenize(r'foo\=bar\\baz')
-        ['foo', Escaped('='), 'bar', Escaped('\\'), 'baz']
+        ['foo', Escaped('='), 'bar\\\\baz']
 
         """
         tokens = ['']

httpie/cli/constants.py

@@ -52,6 +52,8 @@
 SEPARATOR_GROUP_NESTED_JSON_ITEMS = frozenset([
     SEPARATOR_DATA_STRING,
     SEPARATOR_DATA_RAW_JSON,
+    SEPARATOR_DATA_EMBED_FILE_CONTENTS,
+    SEPARATOR_DATA_EMBED_RAW_JSON_FILE,
 ])
 
 # Separators allowed in ITEM arguments