Style: Trim trailing whitespace and ensure newline at EOF

Found by apply the file_format checks again via #91597.

modules/gdscript/tests/scripts/lsp/lambdas.gd

@@ -7,7 +7,7 @@ var lambda_member1 := func(alpha: int, beta): return alpha + beta
 #   |            |         ^^^^^ \1:alpha -> \1:alpha
 #   ^^^^^^^^^^^^^^ \1 -> \1
 
-var lambda_member2 := func(alpha, beta: int) -> int: 
+var lambda_member2 := func(alpha, beta: int) -> int:
 #   |            |         |   |  |  |
 #   |            |         |   |  |  |
 #   |            |         |   |  ^^^^ \2:beta -> \2:beta
@@ -76,7 +76,7 @@ func _ready() -> void:
 	#   |          |        |   |  ^^^^ \local:beta -> \local:beta
 	#   |          |        ^^^^^ \local:alpha -> \local:alpha
 	#   ^^^^^^^^^^^^ \local -> \local
-	
+
 	var value := 42
 	#   ^^^^^ local:value -> local:value
 	var lambda_capture = func(): return value + some_name.length()

modules/gdscript/tests/scripts/lsp/local_variables.gd

@@ -9,7 +9,7 @@ func test_member() -> void:
 	#   ^^^^ test -> test
 	test += 3
 	#<^^ -> test
-	member += 5	
+	member += 5
 	#<^^^^ -> member
 	test = return_arg(test)
 	#  |              ^^^^ -> test
@@ -22,4 +22,4 @@ func return_arg(arg: int) -> int:
 	arg += 2
 	#<^ -> arg
 	return arg
-	#      ^^^ -> arg
+	#      ^^^ -> arg

modules/gdscript/tests/scripts/lsp/properties.gd

@@ -16,7 +16,7 @@ var prop3 := 42:
 		#<^^^ -> prop3
 var prop4: int:
 #   ^^^^^ prop4 -> prop4
-	get: 
+	get:
 		return 42
 var prop5 := 42:
 #   ^^^^^ prop5 -> prop5

modules/gdscript/tests/scripts/lsp/scopes.gd

@@ -68,16 +68,16 @@ func m():
 
 	match value:
 	#     ^^^^^ -> m:value
-		13: 
+		13:
 			print(value)
 			#     ^^^^^ -> m:value
-		[var start, _, var end]: 
+		[var start, _, var end]:
 		#    |   |         ^^^ m:match:array:end -> m:match:array:end
 		#    ^^^^^  m:match:array:start -> m:match:array:start
 			print(start + end)
 			#     |   |   ^^^ -> m:match:array:end
 			#     ^^^^^ -> m:match:array:start
-		{ "name": var name }: 
+		{ "name": var name }:
 		#             ^^^^ m:match:dict:var -> m:match:dict:var
 			print(name)
 			#     ^^^^ -> m:match:dict:var
@@ -87,10 +87,10 @@ func m():
 			#     ^^^^^^^^ -> m:match:var
 
 func m2():
-	var value = 42 
+	var value = 42
 	#   ^^^^^ m2:value -> m2:value
 
-	match value: 
+	match value:
 	#     ^^^^^ -> m2:value
 		{ "name": var name }:
 		#             ^^^^ m2:match:dict:var -> m2:match:dict:var