Various minor adjustments to snippets

UltiSnips/ada.snippets

@@ -38,8 +38,8 @@ for parameter in parameters:
 		paramless = parameter.replace("\t", "")
 		snip.rv += f"-- @variable {paramless}\n"
 `-- @description $5
-function ${1:Name}($2`!p if (t[2] == ""):
-	t[2] = "a, b: Integer"`) return ${3:Integer} is
+function ${1:Name}${2:a, b: Integer}`!p if (t[2] != "" and not t[2].startswith("(")):
+	t[2] = f"({t[2]})"` return ${3:Integer} is
 	$4
 begin
 	$7