fix: Stop propagation of annotation to next parameter in signature template

Issue #110: #110

Author: pawamoy

src/mkdocstrings_handlers/python/templates/material/_base/signature.html

@@ -11,10 +11,6 @@
         )
     -%}
 
-    {%- if config.show_signature_annotations -%}
-      {%- set ns.equal = " = " -%}
-    {%- endif -%}
-
     (
       {%- for parameter in function.parameters -%}
         {%- if parameter.name not in ("self", "cls") or loop.index0 > 0 or not (function.parent and function.parent.is_class) -%}
@@ -31,13 +27,17 @@
           {%- endif -%}
 
           {%- if config.show_signature_annotations and parameter.annotation is not none -%}
+            {%- set ns.equal = " = " -%}
             {%- if config.separate_signature and config.signature_crossrefs -%}
               {%- with expression = parameter.annotation -%}
                 {%- set ns.annotation -%}: {% include "expression.html" with context %}{%- endset -%}
               {%- endwith -%}
             {%- else -%}
               {%- set ns.annotation = ": " + parameter.annotation|safe -%}
             {%- endif -%}
+          {%- else -%}
+            {%- set ns.equal = "=" -%}
+            {%- set ns.annotation = "" -%}
           {%- endif -%}
 
           {%- if parameter.default is not none and parameter.kind.value != "variadic positional" and parameter.kind.value != "variadic keyword" -%}