update shell/README
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/README b/shell/README
index 550c712..6a9f5b6 100644
--- a/shell/README
+++ b/shell/README
@@ -34,7 +34,7 @@
It says that shell must implement special built-ins. Special built-ins
differ from regular ones by the fact that variable assignments
-done on special builtin is *PRESERVED*. That is,
+done on special builtin are *PRESERVED*. That is,
VAR=VAL special_builtin; echo $VAR
@@ -43,7 +43,7 @@
(Another distinction is that an error in special built-in should
abort the shell, but this is not such a critical difference,
and moreover, at least bash's "set" does not follow this rule,
-which is even codified in autoconf now...).
+which is even codified in autoconf configure logic now...)
List of special builtins:
@@ -73,7 +73,7 @@
In practice, no one uses this obscure feature - none of these builtins
gives any special reasons to play such dirty tricks.
-However. This section says that *function invocation* should act
+However. This section also says that *function invocation* should act
similar to special built-in. That is, variable assignments
done on function invocation should be preserved after function invocation.