fix(grammars): restore backslash escaping in llama31 grammar fixture (#11242)

PR #11041 rewrote the testllama31inputResult1 fixture and un-escaped the
backslashes inside its Go raw-string literal, turning `[^"\\]` into
`[^"\]` and `["\\/bfnrt]` into `["\/bfnrt]`. The fixture is compared
line-by-line against the grammar built from PRIMITIVE_RULES in
bnf_rules.go, which is unchanged and still emits the doubled form, so
"generates a valid grammar from JSON schema" fails on every platform.

Restore the four fixture lines to their pre-#11041 form. The cyclic $ref
and depth specs added by that PR are untouched.

The regression reached master because only the DCO check ever reported
on #11041; its test runs were cancelled during the CI purge.


Assisted-by: Claude Code:claude-opus-5[1m] [Bash] [Edit]

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
Co-authored-by: Ettore Di Giacinto <mudler@localai.io>

Author: localai-bot

pkg/functions/grammars/llama31_schema_test.go

@@ -43,8 +43,8 @@ const (
 	// <function=example_function_name>{{"example_name": "example_value"}}</function>
 	testllama31inputResult1 = `root-0-function ::= "create_event"
 freestring ::= (
-		[^"\] |
-		"\\" (["\/bfnrt] | "u" [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F])
+		[^"\\] |
+		"\\" (["\\/bfnrt] | "u" [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F])
   )* space
 root-0 ::= "<function=" root-0-function ">{" root-0-arguments "}</function>"
 root-1-arguments ::= "{" space "\"query\"" space ":" space string "}" space
@@ -53,8 +53,8 @@ space ::= " "?
 root-0-arguments ::= "{" space "\"date\"" space ":" space string "," space "\"time\"" space ":" space string "," space "\"title\"" space ":" space string "}" space
 root-1 ::= "<function=" root-1-function ">{" root-1-arguments "}</function>"
 string ::= "\"" (
-	[^"\] |
-	"\\" (["\/bfnrt] | "u" [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F])
+	[^"\\] |
+	"\\" (["\\/bfnrt] | "u" [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F])
 )* "\"" space
 root-1-function ::= "search"`
 )