Spelling fixes

* doc/misc/calc.texi (Predefined Units): Use the bland modern
scientific style for spelling the units “ampere” and
“angstrom” rather than the older style “Ampere” and
“Ångstrom”.  The latter spelling was wrong anyway (it should
have been “Ångström”).
* lisp/emacs-lisp/ert.el (ert--explain-equal-rec):
Fix misspelling of ‘atom’ in code.

1 files changed, 1 insertions, 1 deletions

diff --git a/test/automated/character-fold-tests.el b/test/automated/character-fold-tests.el
index 4e8761e6f7b..c0568625649 100644
--- a/test/automated/character-fold-tests.el
+++ b/test/automated/character-fold-tests.el
@@ -113,7 +113,7 @@
         ;; Our initial implementation of case-folding in char-folding
         ;; created a lot of redundant paths in the regexp. Because of
         ;; that, if a really long string "almost" matches, the regexp
-        ;; engine took a long time to realise that it doesn't match.
+        ;; engine took a long time to realize that it doesn't match.
         (should-not (character-fold-search-forward (concat string "c") nil 'noerror))
         ;; Ensure it took less than a second.
         (should (< (- (time-to-seconds (current-time))