profiling: replace '+' markup of nested lines with indentation

The display of nested lines for hg --profile was very non-obvious and made it
look like sort didn't work.

The '+' immediately before CallCount was not related to the CallCount and did
not mean plus in any integer sense.

The '+' before module looked like a part of the module name and not like ascii
art.

Instead we now indent the subordinate module names to clearly show the
structure.

mercurial/help/config.txt

@@ -1001,9 +1001,8 b' profiling is done using lsprof.'
     Default: 30.
 
 ``nested``
-    Show at most this number of lines of drill-down info in a tree structure
-    after each main entry. This can help explain the difference between Total
-    and Inline.
+    Show at most this number of lines of drill-down info after each main entry.
+    This can help explain the difference between Total and Inline.
     Specific to the ``ls`` instrumenting profiler.
     Default: 5.
 

mercurial/lsprof.py

@@ -50,9 +50,9 b' class Stats(object):'
             ccount = 0
             if climit and e.calls:
                 for se in e.calls:
-                    file.write(cols % ("+%s" % se.callcount, se.reccallcount,
+                    file.write(cols % (se.callcount, se.reccallcount,
                                        se.totaltime, se.inlinetime,
-                                       "+%s" % label(se.code)))
+                                       "    %s" % label(se.code)))
                     count += 1
                     ccount += 1
                     if limit is not None and count == limit: