style(testdata): canonicalise forms_amd64.s

Assisted-by: GLM 5.3

testdata/verify/forms_amd64.s

@@ -1,4 +1,4 @@
-// Kernel: the operand forms the GOROOT campaign surfaced — numeric
+// Kernel: the operand forms the GOROOT campaign surfaced: numeric
 // PC-relative jumps, symbol-immediate materialisation (the toolchain rewrites
 // MOVQ $sym(SB) into a RIP-relative LEA) and the negated constant-expression
 // ADJSP the cgo ABI macros write.  Bytes are pinned against go tool asm by
@@ -6,6 +6,7 @@
 #include "textflag.h"
 
 DATA sd<>(SB)/4, $7
+
 GLOBL sd<>(SB), RODATA, $4
 
 // func Jumps(flag int64) int64
@@ -30,8 +31,8 @@ TEXT ·SymImm(SB), NOSPLIT, $0-16
 TEXT ·Frame(SB), NOSPLIT, $0
 	PUSHFQ
 	CLD
-	ADJSP	$(64 - 8)
-	ADJSP	$-(64 - 8)
+	ADJSP  $ (64-8)
+	ADJSP  $- (64-8)
 	POPFQ
 	RET