fix(6477): a plain-word call needs the parenthesis right after the word

Read against Fabled Archives after the cleanup: of the 9 rows still linked
to snippet #5448 (symbol `file`), all but one matched prose in a comment,
"a file (not a directory)", "the file (ScanWaiting". The only real call
was `r.file(ctx, ...)`. Formatted code never puts a space before a call's
parenthesis and prose does, so the plain-word test is now `word(` with no
whitespace. _PROPOSER_VERSION 8 re-reads every row once.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/grimoire/services/shape_ledger.py

@@ -1798,7 +1798,7 @@ def _semantic_priority(row) -> tuple:
 # were examined under, so a tightened rule re-examines everything once. A
 # change that does not alter what is proposed needs no bump. A stale "miss"
 # basis on an old row is inert: a miss is not evidence (see _SEMANTIC_LIMIT).
-_PROPOSER_VERSION = 7
+_PROPOSER_VERSION = 8
 # Signature resemblance floor, name blanked (difflib ratio) — and a length
 # floor, because `def NAME():` resembles `def NAME(x):` at 0.95 while saying
 # nothing; a family shape has parameters to resemble.
@@ -1939,7 +1939,9 @@ def names_canon(
       unless the canon is recorded in this very file;
     - never a generic verb, with or without a leading underscore;
     - a bare lowercase word (`file`, `seen`, `seal`) only where it is called
-      as `word(`, because as a plain word it is everyone's variable.
+      as `word(`, because as a plain word it is everyone's variable. No space
+      is allowed before the parenthesis: formatted code never has one, and
+      prose does ("a file (not a directory)").
     Same kind and language family are checked by the callers' loops."""
     sym = _norm_symbol(canon.symbol or "")
     if not sym:
@@ -1954,7 +1956,7 @@ def names_canon(
         if not any(lp and _path_touches(lp, path) for lp, _ls in canon.locations):
             return False
     if kind == "sym" and re.fullmatch(r"[a-z]+", sym):
-        return re.search(rf"(?<![\w$]){re.escape(sym)}\s*\(", body or "") is not None
+        return re.search(rf"(?<![\w$]){re.escape(sym)}\(", body or "") is not None
     return references_symbol(body, sym, kind)