docs: typo: s/go/to/

Signed-off-by: Michael Witten <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: mfwitten

Documentation/technical/api-history-graph.txt

@@ -80,7 +80,7 @@ Calling sequence
   it is invoked.
 
 * For each commit, call `graph_next_line()` repeatedly, until
-  `graph_is_commit_finished()` returns non-zero.  Each call go
+  `graph_is_commit_finished()` returns non-zero.  Each call to
   `graph_next_line()` will output a single line of the graph.  The resulting
   lines will not contain any newlines.  `graph_next_line()` returns 1 if the
   resulting line contains the current commit, or 0 if this is merely a line