fix docs of ElementwiseLambdaLayer (#588)

* fix docs of ElementwiseLambdaLayer

* Update CHANGELOG.md

* Update CHANGELOG.md

Author: zsdonghao

CHANGELOG.md

@@ -91,6 +91,7 @@ To release a new version, please update the changelog as followed:
 - Issue #498 - Deprecation Warning Fix in `tl.layers.RNNLayer` with `inspect` (by @DEKHTIARJonathan in #574)
 - Issue #498 - Deprecation Warning Fix in `tl.files` with truth value of an empty array is ambiguous (by @DEKHTIARJonathan in #575)
 - Issue #572 with deformable convolution fixed (by @DEKHTIARJonathan in #573)
+- Typo of the document of ElementwiseLambdaLayer (by @zsdonghao in #588)
 
 ### Security
 

tensorlayer/layers/merge.py

@@ -154,7 +154,7 @@ def __init__(
 
 
 class ElementwiseLambdaLayer(Layer):
-    """A layer that use a custom function to combine multiple :class:Layer inputs.
+    """A layer that use a custom function to combine multiple :class:`Layer` inputs.
 
     Parameters
     ----------