Fix Python FunctionList absorbing next function issue if space after colon

Allow spaces between ':' and EOL.

Fix #16636, close #16637

PowerEditor/Test/FunctionList/python/function_space_test/unitTest

@@ -0,0 +1,11 @@
+def func1(a,b):
+    pass
+
+def func2(a,b): 
+    pass
+
+def func3(a,b):
+    pass
+
+def func4(a,b):
+    pass

PowerEditor/Test/FunctionList/python/function_space_test/unitTest.expected.result

@@ -0,0 +1 @@
+{"leaves":["func1(a,b)","func2(a,b)","func3(a,b)","func4(a,b)"],"root":"unitTest"}

PowerEditor/Test/FunctionList/python/function_space_test/unitTest.result.json

@@ -0,0 +1 @@
+{"leaves":["func1(a,b)","func2(a,b)","func3(a,b)","func4(a,b)"],"root":"unitTest"}

PowerEditor/installer/functionList/python.xml

@@ -22,7 +22,7 @@
 					<nameExpr expr="\w+(?=\s*[\(|:])" />
 				</className>
 				<function
-					mainExpr="\s(async )?def\x20\K.+?(?=(:$|,$|:\s*#))"
+					mainExpr="\s(async )?def\x20\K.+?(?=(:\h*$|,\h*$|:\s*#))"
 				>
 					<functionName>
 						<funcNameExpr expr=".*" />
@@ -30,7 +30,7 @@
 				</function>
 			</classRange>
 			<function
-				mainExpr="^(async )?def\x20\K.+?(?=(:$|,$|:\s*#))"
+				mainExpr="^(async )?def\x20\K.+?(?=(:\h*$|,\h*$|:\s*#))"
 			>
 				<functionName>
 					<nameExpr expr=".*" />