Fix whitespace-sensitive build.

Change-Id: I82c6c49e253275543831dbaf288cb63d759ea20a
diff --git a/disassembler/disassembler_arm.cc b/disassembler/disassembler_arm.cc
index e262216..6239e9a 100644
--- a/disassembler/disassembler_arm.cc
+++ b/disassembler/disassembler_arm.cc
@@ -1021,7 +1021,7 @@
             if (Rm.r != Rm2.r || Rm.r == 13 || Rm.r == 15 || Rd.r == 13 || Rd.r == 15) {
               args << " (UNPREDICTABLE)";
             }
-          } // else unknown instruction
+          }  // else unknown instruction
           break;
         }
         case 0x05: case 0x0D: case 0x15: case 0x1D: {  // 00xx101