Escape newlines in default disassembly format.

We can safely escape newlines in format strings because they will be
ignored by the format entity parser.

llvm-svn: 343470
diff --git a/lldb/source/Core/Debugger.cpp b/lldb/source/Core/Debugger.cpp
index b7bf76b..1c2d69c 100644
--- a/lldb/source/Core/Debugger.cpp
+++ b/lldb/source/Core/Debugger.cpp
@@ -163,8 +163,8 @@
 //      address <+offset>:
 #define DEFAULT_DISASSEMBLY_FORMAT                                             \
   "{${function.initial-function}{${module.file.basename}`}{${function.name-"   \
-  "without-args}}:\n}{${function.changed}\n{${module.file.basename}`}{${"      \
-  "function.name-without-args}}:\n}{${current-pc-arrow} "                      \
+  "without-args}}:\\n}{${function.changed}\\n{${module.file.basename}`}{${"    \
+  "function.name-without-args}}:\\n}{${current-pc-arrow} "                     \
   "}${addr-file-or-load}{ "                                                    \
   "<${function.concrete-only-addr-offset-no-padding}>}: "