Update runtime files.
diff --git a/runtime/doc/develop.txt b/runtime/doc/develop.txt
index 9c7867c..59e44dc 100644
--- a/runtime/doc/develop.txt
+++ b/runtime/doc/develop.txt
@@ -1,4 +1,4 @@
-*develop.txt* For Vim version 8.1. Last change: 2019 Feb 17
+*develop.txt* For Vim version 8.1. Last change: 2019 Aug 05
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -529,7 +529,7 @@
memory use, but takes a long time. On a fast PC it takes a couple of
seconds for English, which can be acceptable for interactive use. But for
some languages it takes more than ten seconds (e.g., German, Catalan),
- which is unacceptable slow. For batch processing (automatic corrections)
+ which is unacceptably slow. For batch processing (automatic corrections)
it's too slow for all languages.
2. Use a trie for the soundfolded words, so that searching can be done just
like how it works without soundfolding. This requires remembering a list