Fix WriteAsOperand to not emit a leading space character. Adjust
its callers to emit a space character before calling it when a
space is needed.

This fixes several spurious whitespace issues in
ScalarEvolution's debug dumps. See the test changes for
examples.

This also fixes odd space-after-tab indentation in the output
for switch statements, and changes calls from being printed like
this:
  call void @foo( i32 %x )
to this:
  call void @foo(i32 %x)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56196 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Analysis/LoopInfo/2003-05-15-NestingProblem.ll b/test/Analysis/LoopInfo/2003-05-15-NestingProblem.ll
index a3da523..48f4cfb 100644
--- a/test/Analysis/LoopInfo/2003-05-15-NestingProblem.ll
+++ b/test/Analysis/LoopInfo/2003-05-15-NestingProblem.ll
@@ -2,7 +2,7 @@
 ; not a child of the loopentry.6 loop.
 ;
 ; RUN: llvm-as < %s | opt -analyze -loops | \
-; RUN:   grep {^            Loop Containing:  %loopentry.7}
+; RUN:   grep {^            Loop Containing: %loopentry.7}
 
 define void @getAndMoveToFrontDecode() {
 	br label %endif.2