Cleaned up many error codes. For any who is filling in error strings into

lldb_private::Error objects the rules are:
- short strings that don't start with a capitol letter unless the name is a
  class or anything else that is always capitolized
- no trailing newline character
- should be one line if possible

Implemented a first pass at adding "--gdb-format" support to anything that
accepts format with optional size/count.

llvm-svn: 142999

lldb/source/API/SBThread.cpp

@@ -732,7 +732,7 @@ SBThread::StepOverUntil (lldb::SBFrame &sb_frame,
                 sb_error.SetErrorStringWithFormat("No line entries for %s:%u", path, line);
             }
             else
-                sb_error.SetErrorString ("Step until target not in current function.\n");
+                sb_error.SetErrorString ("step until target not in current function");
         }
         else
         {