fix: use placeholder in comments for empty component names (#1850) #992

Job	Run time
get-leptos-changed / Detect Source Change	8s
CI (integrations/actix) / Run ci (nightly)	16m 41s
CI (integrations/axum) / Run ci (nightly)	19m 57s
CI (integrations/utils) / Run ci (nightly)	18m 33s
CI (integrations/viz) / Run ci (nightly)	17m 44s
CI (leptos) / Run ci (nightly)	1h 28m 4s
CI (leptos_config) / Run ci (nightly)	17m 12s
CI (leptos_dom) / Run ci (nightly)	38m 30s
CI (leptos_hot_reload) / Run ci (nightly)	18m 19s
CI (leptos_macro) / Run ci (nightly)	26m 6s
CI (leptos_reactive) / Run ci (nightly)	48m 16s
CI (leptos_server) / Run ci (nightly)	39m 28s
CI (meta) / Run ci (nightly)	16m 23s
CI (server_fn) / Run ci (nightly)	16m 27s
CI (server_fn_macro) / Run ci (nightly)	14m 10s
CI (router) / Run ci (nightly)	22m 11s
CI (server_fn/server_fn_macro_default) / Run ci (nightly)	14m 31s
	7h 12m 40s

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