Separate multiple instructions per line with :: (#1210)

test/asm/anon-label-bad.err

@@ -3,5 +3,5 @@ error: anon-label-bad.asm(2):
 error: anon-label-bad.asm(6):
     Reference to anonymous label 2 before, when only 1 has been created so far
 error: anon-label-bad.asm(18):
-    syntax error, unexpected :
+    syntax error, unexpected ::
 error: Assembly aborted (3 errors)!

test/asm/macro-syntax.err

@@ -1,7 +1,9 @@
+error: macro-syntax.asm(7):
+    Label "old" created outside of a SECTION
 error: macro-syntax.asm(7):
     syntax error, unexpected MACRO
 error: macro-syntax.asm(8):
     Macro argument '\1' not defined
 error: macro-syntax.asm(9):
     syntax error, unexpected ENDM
-error: Assembly aborted (3 errors)!
+error: Assembly aborted (4 errors)!

test/asm/macro-syntax.simple.err

@@ -1,7 +1,9 @@
+error: macro-syntax.asm(7):
+    Label "old" created outside of a SECTION
 error: macro-syntax.asm(7):
     syntax error
 error: macro-syntax.asm(8):
     Macro argument '\1' not defined
 error: macro-syntax.asm(9):
     syntax error
-error: Assembly aborted (3 errors)!
+error: Assembly aborted (4 errors)!

test/asm/multiple-instructions.asm

@@ -0,0 +1,11 @@
+SECTION "test", ROM0
+
+push hl :: pop hl :: ret
+
+Label: nop :: call z, .local :: ld b, a
+.local push bc :: jr z, Label :: pop bc
+	nop :: ld a, \
+	b :: ret
+
+Label2::jr Label2::ret
+.local2::call nz, .local2::ret