[Docs] Correct some indentation muppetry that trips buildbots

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358388 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/SourceLevelDebugging.rst b/docs/SourceLevelDebugging.rst
index e710bf9..977b7b7 100644
--- a/docs/SourceLevelDebugging.rst
+++ b/docs/SourceLevelDebugging.rst
@@ -531,9 +531,9 @@
 variable to their machine locations over ranges of instructions.
 From IR to object emission, the major transformations which affect variable
 location fidelity are:
- 1. Instruction Selection
- 2. Register allocation
- 3. Block layout
+1. Instruction Selection
+2. Register allocation
+3. Block layout
 each of which are discussed below. In addition, instruction scheduling can
 significantly change the ordering of the program, and occurs in a number of