A few edits

Author: isidentical

docs/README.md

@@ -782,10 +782,9 @@ $ http --offline --print=B pie.dev/post \
 }
 ```
 
-Starting with 3.0, we have embedded a mini language inside HTTPie's own syntax to
-build complex JSON with ease. This syntax was inspired by the [JSON form](https://www.w3.org/TR/html-json-forms/)
-proposal for HTML, though we have changed a lot of parts to offer the best experience
-and reduce the number of typing-caused failures.
+Starting with 3.0, we have created a mini language in HTTPie's own syntax to
+build complex JSON objects with ease. This syntax was inspired by the [JSON form](https://www.w3.org/TR/html-json-forms/)
+proposal for HTML, though we have changed a lot of parts to offer the best experience.
 
 #### Introduction
 

httpie/cli/nested_json.py

@@ -146,7 +146,7 @@ def __init__(
     def reconstruct(self) -> str:
         if self.kind == 'key':
             if self.is_root:
-                return self.accessor
+                return str(self.accessor)
             return '[' + self.accessor + ']'
         elif self.kind == 'index':
             return '[' + str(self.accessor) + ']'
@@ -186,10 +186,12 @@ def expect(*kinds):
             cursor += 1
             if token.kind in kinds:
                 return token
-        else:
+        elif tokens:
             token = tokens[-1]._replace(
                 start=tokens[-1].end + 0, end=tokens[-1].end + 1
             )
+        else:
+            token = None
 
         if len(kinds) == 1:
             suffix = kinds[0].to_name()
@@ -272,7 +274,7 @@ def type_check(index: int, path: Path, expected_type: Type[Any]) -> None:
                 key, pseudo_token, message, message_kind='Type'
             )
 
-    def object_for(kind: str) -> str:
+    def object_for(kind: str) -> Any:
         if kind == 'key':
             return {}
         elif kind in {'index', 'append'}: