runtime: Fix typos in various files

closes: #12836

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Viktor Szépe <viktor@szepe.net>
diff --git a/runtime/syntax/tf.vim b/runtime/syntax/tf.vim
index 47775b8..df6adcf 100644
--- a/runtime/syntax/tf.vim
+++ b/runtime/syntax/tf.vim
@@ -27,7 +27,7 @@
 syn keyword tfVar  emulation end_color gag gethostbyname gpri hook hilite  contained
 syn keyword tfVar  hiliteattr histsize hpri insert isize istrip kecho  contained
 syn keyword tfVar  kprefix login lp lpquote maildelay matching max_iter  contained
-syn keyword tfVar  max_recur mecho more mprefix oldslash promt_sec  contained
+syn keyword tfVar  max_recur mecho more mprefix oldslash prompt_sec  contained
 syn keyword tfVar  prompt_usec proxy_host proxy_port ptime qecho qprefix  contained
 syn keyword tfVar  quite quitdone redef refreshtime scroll shpause snarf sockmload  contained
 syn keyword tfVar  start_color tabsize telopt sub time_format visual  contained