If the heuristic doesn't work, the displayed source will be wrong, but will
probably be near the actual source. If the ``shape'' of the top-level form in
the source file is too different from the original form, then an error will be
-signaled. When the heuristic is used, the the source location commands are
+signaled. When the heuristic is used, the source location commands are
noticeably slowed.
Source location printing can also be confused if (after the source was
@item The block start location may be the same as the true location.
-@item The block start location will never be later in the the
+@item The block start location will never be later in the
program's flow of control than the true location.
@item No conditional control structures (such as @code{if},
@c @cindex Breakpoints
@c SBCL supports setting of breakpoints inside compiled functions and
-@c stepping of compiled code. Breakpoints can only be set at at known
+@c stepping of compiled code. Breakpoints can only be set at known
@c locations (@pxref{Unknown Locations and Interrupts}), so these
@c commands are largely useless unless the @code{debug} optimize quality
@c is at least @code{2} (@pxref{Debugger Policy Control}). These