Add description for API checkMethodCalls in the docs (#589)

Author: zinwang

docs/source/quark_script.rst

@@ -90,6 +90,16 @@ findMethodInAPK(samplePath, targetMethod)
     2. targetMethod: A python list contains class name, method name, and descriptor of target method
 - **return**: Python list contains caller method instance of target method
 
+checkMethodCalls(samplePath, targetMethod, checkMethods)
+=========================================================
+
+- **Description**: Check any of the specific methods shown in the target method.
+- **params**: 
+    1. samplePath: target file
+    2. targetMethod: python list contains the class name, method name, and descriptor of the target method or a Method Object
+    3. checkMethods: python list contains the class name, method name, and descriptor of the target method
+- **return**: bool that indicates if the specific methods are called or defined within a target method or not
+
 Rule(rule.json)
 ===============
 

quark/script/__init__.py

@@ -637,16 +637,17 @@ def checkMethodCalls(
         samplePath: PathLike,
         targetMethod: Union[Tuple[str, str, str], MethodObject],
         checkMethods: List[Tuple[str, str, str]]) -> bool:
-    """Check if any of the specific methods shown in the `targetMethod`
+    """Check any of the specific methods shown in the target method.
 
     :param samplePath: target file
     :param targetMethod: python list contains the class name,
                          method name, and descriptor of the target method
-                         or a Method Object.
+                         or a Method Object
     :param checkMethods: python list contains the class name,
                          method name, and descriptor of the target method
 
-    :return: bool that indicate specific methods can be called or defined within a `target method` or not.
+    :return: bool that indicates if the specific methods are called or
+             defined within a target method or not
     """
     targetMethodSet = set()
     checkMethodSet = set()