zasm: rename LDdd(n) to LDd(n)

it seems I left my asm argument harmonization half done here.

Instructions list at B208 doesn't correspond to many actual
mnemonics. This mnemonic here was the worst offender.

blk/242

@@ -1,4 +1,4 @@
-: LDdd(n), ( d n -- )
+: LDd(n), ( d n -- )
     0xed A,
     SWAP <<4 0x4b OR A,
     A,,

blk/284

@@ -9,5 +9,5 @@ HERESTART [IF]
     HL HERESTART LDdn,
 [THEN]
     SYSVARS 0x04 + LD(n)HL, ( RAM+04 == HERE )
-    DE BIN( @ 0x04 ( BOOT ) + LDdd(n),
+    DE BIN( @ 0x04 ( BOOT ) + LDd(n),
     JR, L1 FWR ( execute, B287 )

blk/286

@@ -7,7 +7,7 @@ lblnext BSET PC ORG @ 0x1b + ! ( next )
     SP SUBHLd, HL POP,
     IFNC, ( SP <= IX? overflow )
         SP PS_ADDR LDdn, IX RS_ADDR LDdn,
-        DE BIN( @ 0x13 ( oflw ) + LDdd(n),
+        DE BIN( @ 0x13 ( oflw ) + LDd(n),
         JR, L2 FWR ( execute, B287 )
     THEN,
     LDA(BC), E A LDrr, BC INCd,

blk/290

@@ -1,5 +1,5 @@
 lbluflw BSET ( abortUnderflow )
-    DE BIN( @ 0x06 ( uflw ) + LDdd(n),
+    DE BIN( @ 0x06 ( uflw ) + LDd(n),
     JR, lblexec BWR
 lblchkPS BSET ( chkPS )
 ( Note that you only need to call this in words that push

blk/583

@@ -8,6 +8,6 @@
         ACIAW> LDHL(n),
         ( is it == to ACIAR>? )
         ( +0 == ACIAR> )
-        DE ACIAR> LDdd(n),
+        DE ACIAR> LDd(n),
         ( carry cleared from ANDi above )
         DE SBCHLd,                                    ( cont. )

blk/584

@@ -7,7 +7,7 @@
             ( advance W> )
             HL INCd,
             ACIAW> LD(n)HL,
-            DE ACIA) LDdd(n),
+            DE ACIA) LDd(n),
             DE SUBHLd,