fix first paragraph

prompts/LLM_PROSE_TELLS.md

@@ -1,9 +1,8 @@
 # LLM Prose Tells
 
-All of these show up in human writing occasionally. No single one is conclusive
-on its own. The difference is concentration. A person might lean on one or two
-of these habits across an entire essay, but LLM output will use fifteen of them
-per paragraph.
+All of these show up in human writing occasionally. None of them are conclusive
+on their own. What matters is how many appear at once. A person might lean on
+one or two across an entire essay. LLM output will use fifteen per paragraph.
 
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