Subzero: Fix trailing whitespace errors.

tests_lit/assembler/arm32/sandboxing.ll

 ; Tests basics and corner cases of arm32 sandboxing, using -Om1 in the hope that
 ; the output will remain stable.  When packing bundles, we try to limit to a few
 ; instructions with well known sizes and minimal use of registers and stack
 ; slots in the lowering sequence.
 
 ; REQUIRES: allow_dump, target_ARM32
 ; RUN: %p2i -i %s --sandbox --filetype=asm --target=arm32 --assemble \
 ; RUN:   --disassemble --args -Om1 -allow-externally-defined-symbols \
 ; RUN:   -ffunction-sections  | FileCheck %s
 
@@ skipping 19 matching lines @@
 define internal void @test_indirect_call(i32 %target) {
 entry:
   %__1 = inttoptr i32 %target to void ()*
   call void %__1()
   ret void
 }
 ; CHECK-LABEL: test_indirect_call
 ; CHECK: sub sp,
 ; CHECK: bic sp, sp, {{.*}} ; 0xc0000000
 ; CHECK-NOT: bic sp, sp, {{.*}} ; 0xc0000000
-; CHECK: ldr [[REG:r[0-9]+]], [sp, 
+; CHECK: ldr [[REG:r[0-9]+]], [sp,
 ; CHECK-NEXT: nop
 ; CHECK: {{[0-9]+}}8: {{.*}} bic [[REG:r[0-9]+]], [[REG]], {{.*}} 0xc000000f
 ; CHECK-NEXT: blx [[REG]]
 ; CHECk-NEXT: {{[0-9]+}}0:
 
 ; A return sequences uses the right pop / mask / jmp sequence.
 define internal void @test_ret() {
 entry:
   ret void
 }
@@ skipping 82 matching lines @@
   call void @call_target2(i32 1, i32 2)
   ; bundle boundary
   ret void
 }
 ; CHECK-LABEL: bundle_lock_align_to_end_padding_2
 ; CHECK: mov
 ; CHECK-NEXT: mov
 ; CHECK-NEXT: nop
 ; CHECK-NEXT: nop
 ; CHECK-NEXT: bl {{.*}} call_target2