doc: Use timestamp and timeline instead of time stamp and time line
doc: Use timestamp and timeline instead of time stamp and time line

The document is inconsistent with its use of time stamp and timestamp
as well as time line and timeline.  This patch changes them all to
be single words, except when referencing the GUI labels which have
the space.

Reported-by: Randy Dunlap <e1d10faa7e2a0c027bf1ff1d20e7fd10154be7ea@oracle.com>
Signed-off-by: Steven Rostedt <43232e92d70cc7aa53504ad0397085ee47bad87f@goodmis.org>

bigzz/trace-cmd,bigzz/trace-cmd