Spelling fixes.

doc/emacs/ack.texi

@@ -1250,7 +1250,7 @@ Daiki Ueno wrote @file{starttls.el}, support for Transport Layer
 Security protocol; @file{sasl-cram.el} and @file{sasl-digest.el} (with
 Kenichi Okada), and @file{sasl.el}, support for Simple Authentication
 and Security Layer (SASL); @file{plstore.el} for secure storage of
-propery lists; and the EasyPG (and its predecessor PGG)
+property lists; and the EasyPG (and its predecessor PGG)
 package, for GnuPG and PGP support.
 
 @item

doc/lispref/macros.texi

@@ -605,7 +605,7 @@ either.
 
   Within a macro definition, you can use the @code{declare} form
 (@pxref{Defining Macros}) to specify how to @key{TAB} should indent
-calls to the macro.  An indentation specifiction is written like this:
+calls to the macro.  An indentation specification is written like this:
 
 @example
 (declare (indent @var{indent-spec}))

doc/lispref/variables.texi

@@ -303,7 +303,7 @@ If a variable is void, trying to evaluate the variable signals a
 
   Under lexical binding rules, the value cell only holds the
 variable's global value, i.e.@: the value outside of any lexical
-binding contruct.  When a variable is lexically bound, the local value
+binding construct.  When a variable is lexically bound, the local value
 is determined by the lexical environment; the variable may have a
 local value if its symbol's value cell is unassigned.